NMSU: Making Perfect Pants
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Making Perfect Pants


Guide C-227
Reviewed by Wendy Hamilton
College of Agricultural, Consumer and Environmental Sciences, New Mexico State University


Author: Professor and CES Grants and Contracts Development Specialist, Media Productions Department, New Mexico State University. (Print friendly PDF)

Women’s fashions come and go, but pants are here to stay. Although the basic shape may change from season to season, pants have become a favorite fashion for women of all ages and for all kinds of activities.

Every woman who wears pants wants them to look good and feel comfortable when she stands, sits, and walks. Three key factors contribute to successful dressing in pants: style, fabric, and fit.

Photo of woman sewingPhoto of woman sewing

Keys to Successful Pants

Style

The first key is knowing which pant styles to avoid and which styles to use with your figure type. Pant styles fall into three basic silhouettes no matter what the current fashion trends are: fitted, straight, and flared. The silhouette you select should be flattering to your figure type.

Seams, darts, gathers, and pleats may be used to shape the silhouette and create a horizontal or vertical illusion in the pant design. Other design details include pockets, yokes, trim of any kind, and the waistline treatment. Select pants that have a flattering silhouette as well as flattering design features.

Follow these basic guidelines for selecting a flattering pant style.

  • Shorter-than-average figures look taller when pants and top are the same color.
  • A tall person looks shorter if the pants and top are different colors or textures.
  • Wide legs create an illusion of fullness.
  • Fitted legs are unflattering for the too-thin as well as for the too-full figure.
  • Flared legs are flattering to tall, slender figures.
  • Straight legs are a good choice for the figure with full thighs or a prominent derriere.
  • Gathers or pleats at the waistline emphasize a protruding abdomen.
  • If you have a very curvy figure, select a style that has two waistline darts on each side of center front and back. Avoid a side zipper opening.
  • Avoid hip-hugger styles if you have full thighs and/or prominent hips.

Fabric Selection

The second key to attractive pants is correct fabric selection. Denim, sports cloth, corduroy, velveteen, gabardine, and a variety of medium-weight blends are suitable for pants. The fabric should be firmly woven to hold its shape and wear well. It should drape over the figure gracefully and should have good wrinkle resistance. Knits are usually a good choice for comfort, but the weight of the knit determines its success as a pant fabric. Avoid soft, clingy knits for most pants fashions—they emphasize figure flaws.

Consider fabric texture and design carefully. Some textured fabrics will be scratchy and require a lining; others will be too bulky for pants.

Select plaids and prints with color and size of plaid or print in mind. The appropriateness of a printed fabric for pants should also be considered.

White and light-colored fabrics may require a lining or underlining to prevent undergarments and seam allowances from showing through. Make sure the lining or underlining fabric has the same care requirements as the pants fabric.

Fit

Fit is the third key to pants comfort and attractive appearance. Pants should fit comfortably at the waistline and fall smoothly over the hips and thighs. In well-fitted pants, the lengthwise grainline is perpendicular to the floor and creases in the legs are on the straight grain. Pants length will vary according to the silhouette.

Some problems to avoid when making (or buying) pants include:

  • Ripples at the waistline.
  • Wrinkles at the crotch.
  • Bagginess at the crotch.
  • Waistline pulling down at center back or center front.
  • Pressed creases that hang off-grain.

Avoid pants that are too tight. Not only are they uncomfortable but they also accentuate figure flaws.

Selecting a Pattern Size

Whether you’re making pants for the first time or the hundredth time, the pattern size you select will be important in altering the pattern for an attractive fit. Because fit at the hip is difficult to alter, select a pattern size according to measurements at the fullest part of your hips, usually 8–9 inches below the waistline.

Fitting Your Pattern

Because patterns are designed for standard figures—and because most of us are not very “standard” in size or shape—always fit your pattern before cutting. You will also need to fit the pattern because patterns vary in fit from design to design, as well as from one brand of pattern to another.

What is your figure type? Some figures are full from front to back; others are wide from side to side. Some are round in front, while others are round in back. Your posture also contributes to your figure type. Because figure types vary, be aware of your own variations to help you fit your pants more successfully.

To determine your figure variations, stand in front of a full-length mirror and study your figure.

Posture Type (Figure 1)

Check the one that looks most like you.

Average. Stands fairly straight. Side seams of pants fall straight and are lined up with the ankle.

Forward-tilted hip. Stands in somewhat slouched manner; fairly flat, low seat, and a high prominent roll below the front waist or high prominent hip bones. This posture causes pants to sag under the seat unless the pattern is altered.

Backward-tilted hip. Stands with tummy lower and posterior out and up. Pants hike up over the seat if the pattern crotch length is not corrected.

Illustration showing the different posture types

Figure 1. Posture types.

Hip Type (Figure 2)

Check the one that looks most like you.

Average. No excessive roundness directly below the waist at sides or back. There is no great side thigh prominence. The greatest circumference measurement is at the seat level, usually 7–9 inches below waist.

Little difference. Little difference between hip and waist measurement; generally doesn’t have curves below the waist.

Heart. Great roundness just below the waist. The upper hip measurement taken 3–4 inches below the waist will be larger than the measurement at the seat level.

Semi-heart. Curves below the waistline may not appear to be as extreme as the heart shape. The lower hip circumference may be the same or up to 1 1/2 inches more than the measurements taken 3–4 inches below the waistline. There is no thigh prominence.

Diamond. Great thigh prominence at the side. The difference between the waist and lower hip measurements is 11 1/2 inches or more.

Rounded diamond. Great prominence at the sides as well as curves just below the waistline. This sometimes makes the difference between the waist and hip much less than a standard diamond.

Illustration showing the different hip shapes

Figure 2. Hip types.

After determining your figure variations, take your measurements and compare them with the measurements of your pattern. Measure over the undergarments you will wear with the pants. Have someone help you take the measurements listed on the following chart.

Take your body measurements (Figure 3) and record them in the chart below.

  1. Waist.
  2. High hip (3 inches below waist).
  3. Hip at fullest part (7–9 inches below waist).
  4. Distance at side from waist down to fullest part of hip.
  5. Pant length (waist to floor).
  6. Thigh at fullest part.
  7. Knee (1 inch above center).
  8. Distance from waist to knee.
  9. Crotch depth. Sit on a flat surface and measure from waist to surface on side (Figure 4).
  10. Crotch length. Measure from center front waist through crotch to center back waist. Mark the measurement from the front waist to the center of your body and the measurement from back waist to the center of your body (Figure 5).

After you have calculated your measurements plus “ease,” compare these measurements to your pattern measurements.

PANTS MEASUREMENT CHART
  You + Ease1 = Total Pattern Change
(+ or -)
1. Waist   1/2–1 in.      
2. High hip 3 in. below waist at side   1/4–1 in.      
3. Hip at fullest part   2 in.      
4. Distance from waist to full hip at side   0      
5. Pant length at side (waist to floor)   for hem      
6. Thigh width at fullest part   1 in.      
7. Knee width 1 in. above center of knee   depends on style      
8. Distance from waist to knee at side   0      
9. Crotch depth2 sitting   1/2–3/4 in.      
10. Crotch length back   1/2–3/4 in.      
11. Crotch length front   1/2–3/4 in.      
1Ease is for comfort. It varies with style, fabric, and how you wear your clothes.
2Alter pattern crotch depth first because it affects crotch length.

Illustration showing body measurement areas

Figure 3. Body measurements areas.

Illustration showing how to measure crotch depth

Figure 4. Crotch depth.

Illustration showing how to measure crotch length

Figure 5. Crotch length.

Measure Pattern

Measure your pattern at the places indicated in Figure 6 and record the measurements.

  • Place the measuring tape flat across pattern for all straight measurements.
  • Stand the tape on edge for all measurements that are on a curve.
  • Do not include darts or seam allowances in any of the measurements.
  • Record these measurements on the measurement chart.

Compare the measurements of your body plus ease to the pattern measurements and record any differences. If differences occur, you must alter your pattern to achieve a good fit. Techniques for altering your pattern are found in the ALTERING YOUR PATTERN section.

Illustration showing pattern measurement locations on a pant

Figure 6. Pattern measurement locations.

Cutting the Pattern and Fabric

After your pattern is correctly fitted, you are ready to make your pants. Your first step will be to read the pattern guide sheet and study the pattern layout. After you are familiar with the pattern, carefully follow the instructions given on the guide sheet.

Cut out your pattern only after the fabric has been prewashed or preshrunk. Prewashing allows the fabric to relax and removes excess fabric resins that can cause problems as you sew.

Lay out the pattern pieces on the fabric as the pattern guide sheet layout suggests. Be sure to follow the “with nap” layout if your fabric has nap.

After the pattern has been cut, take time to press a crease in the front of each pant leg (if required in the instructions). Use the pattern markings to determine where the creases should be. Stop the crease at the crotch. To ensure a firm crease, use a damp cloth and steam. Remember, it is difficult to remove creases set in synthetic fabric, so be sure to set them correctly.

Pants Construction

Follow the guide sheet as you sew the pants. The order will generally be as follows: stay-stitching, seam finishes (if necessary), darts, inner and side leg seams, crotch seam, zipper, waistband, and hems.

Fitting Your Pants

After the pants have been sewn together—but before the zipper is applied—try on your pants. Pin the opening and tie a string snugly around your waistline to hold the pants up (Figure 7).

Observe the fit in a full-length mirror, and adjust the pants from the waistline until the legs hang straight and the crotch is comfortably positioned. Be sure the positions of the grainline and darts are correct. Then, mark the waistline directly under the string and determine the amount the darts and side seams need to be taken in or let out to achieve a good fit at the waistline.

If you make any changes, mark them on the pattern so it will be correct the next time you use it.

Illustration showing sewn pants before the zipper is applied

Figure 7. The first fitting is done after the pants have been sewn together, but before the zipper is applied.

Pressing

Press as you sew to achieve the best results. Press the seams open, using steam to keep them flat. To prevent the seams from creating an impression on the right side, place a piece of paper under the seam allowance as it is pressed.

Altering Your Pattern

Waistline

To increase waistline: Add 1/4 of the total alteration required at each side seam (Figure 8).

To decrease waistline: Remove 1/4 of the total alteration required at each side seam (Figure 9).

Illustration showing how to increase pant waistline Illustration showing how to decrease pant waistline
Figure 8. To increase your waistline. Figure 9. To decrease your waistline.

Leg Shape

To increase leg circumference: Place a piece of paper under the front and back pattern pieces. Add 1/4 of the total increase to the inseam and outer seam of both front and back pieces. To do this, mark the addition outside the cutting lines at the hemline. Redraw cutting lines from marks at hemline, tapering to original cutting line at the desired point.

To decrease leg circumference: Remove 1/4 of the total decrease from the inseam and outer seam of both front and back pieces. To do this, mark the decrease inside the cutting lines at the hemline. Redraw the cutting lines from the marks at the hemline, tapering to the original cutting line at the desired point.

Length

To increase leg length: Cut the pattern apart on length adjustment lines. Place tissue paper under pattern and spread the amount needed, keeping edges parallel. Pin or tape in place. Redraw seams and cutting lines.

To decrease leg length: Measure the amount needed up from length adjustment lines and draw a line. Fold pattern on adjustment line and bring up to drawn line. Pin or tape in place. Redraw seams and cutting lines.

Crotch Depth

To lengthen crotch depth: Cut pattern apart on adjustment line. Place tissue paper under cut areas and spread pattern needed amount, keeping edges parallel. Pin or tape in place. Redraw cutting and seam lines (Figure 10).

To shorten crotch depth: Measure the amount needed up from adjustment line and draw a line across pattern. Fold pattern along adjustment line and bring it up to drawn line. Pin or tape in place. Redraw cutting and seam lines (Figure 11).

Illustration showing how to lengthen pant crotch depth Illustration showing how to shorten pant crotch depth
Figure 10. Lengthen crotch depth. Figure 11. Shorten crotch depth.

Crotch Length

To lengthen crotch line: Add to front and/or back inner leg seams by extending seam at crotch point. Redraw crotch curve from adjustment line to new crotch point on inner leg seam. Redraw inseam from new crotch point to the knee (Figure 12).

To shorten crotch line: Mark amount needed inside cutting line on front and/or back inner leg seams. Redraw crotch curve from adjustment line to new crotch point on inner leg seam. Redraw inseam from new crotch point to the knee (Figure 13).

Illustration showing how to lengthen pant crotch line Illustration showing how to shorten pant crotch line
Figure 12. Lengthen crotch line. Figure 13. Shorten crotch line.

Hips

To increase hip width: Pin or tape tissue paper under front and back pattern pieces along side seams. On both front and back pieces, mark 1/4 of the total increase outside cutting lines along side seams. Draw new seam line. Adjust waistline as needed to achieve correct size (Figure 14).

To decrease hip width: On both front and back pieces, mark 1/4 of the total decrease inside cutting lines along side seams. Adjust waistline as needed to achieve correct size. Redraw seam line and trim off excess pattern paper (Figure 15).

Illustration showing how to increase pant hip width Illustration showing how to decrease pant hip width
Figure 14. Increase hip width. Figure 15. Decrease hip width.

Thighs

To increase thigh width: Pin or tape tissue paper under front and back pattern pieces along both inseams and outer seams. Mark 1/4 of the total addition along the side seams and inseams outside the cutting lines. Draw new cutting line through markings along side seam from hip, tapering into original cutting line near hem. On inseam, start new cutting line at crotch point and redraw cutting line, tapering back to original cutting line near hem (Figure 16).

To decrease thigh width: On both front and back pattern pieces, mark 1/4 of the total decrease inside cutting lines of side seams and inseams. On the side seams, draw new cutting line through markings from hip, tapering to original cutting line near hem. On inseams, redraw new cutting line beginning at crotch point, tapering to original cutting line near hem (Figure 17).

Illustration showing how to increase pant thigh width Illustration showing how to decrease pant thigh width
Figure 16. Increase thigh width. Figure 17. Decrease thigh width.

Buttocks (Adjust pants back pattern piece only.)

To increase buttocks width: Draw a line parallel to grainline through center of waist dart to hem. At hipline, draw a horizontal line across pattern from center back to side. Cut pattern apart on lines, then place paper under pattern. On the horizontal line, spread the pattern the necessary amount from center back, tapering to no spread at sideseam. Spread vertical cut 1/2 of the total increase, tapering to nothing at hem. Pin or tape in place. Redraw cutting lines, seamlines, and darts as needed (Figure 18 ).

To decrease buttocks width: Draw a line parallel to grainline through center of waist dart to hem. Just above the hipline, draw a horizontal line from center back to side. Along the horizontal line, fold a tuck to remove the desired amount at center back, tapering to no tuck at side. Along the vertical line, fold a tuck to remove 1/2 of the desired decrease. Pin or tape in place. Redraw cutting lines, seamlines, and darts as needed (Figure 19).

Illustration showing how to increase pant buttocks width Illustration showing how to decrease pant buttocks width
Figure 18. Increase buttocks width. Figure 19. Decrease buttocks width.

Abdomen (Adjust pants front pattern piece only.)

To increase abdomen width: Draw a line parallel to the grainline through the center of waist dart from waist to hem. Draw a horizontal line about 3–4 inches below waistline from center front to side. Cut pattern apart on lines, then place paper under pattern. On the horizontal slash, spread the pattern the necessary amount at center front and taper to no spread at side seam. Spread vertical cut 1/2 of the total increase, tapering to no spread at hem. Pin or tape in place. Redraw cutting lines, seamlines, and darts as needed (Figure 20).

Illustration showing how to increase pant abdomen width

Figure 20. Increase abdomen width.

For more on this topic, see the following publications:

C-209: Measurements for Fitting Pants
http://aces.nmsu.edu/pubs/_c/C-209/welcome.html

C-221: Zippers Made Easy
http://aces.nmsu.edu/pubs/_c/C-221/welcome.html

C-228: Pattern Alteration
http://aces.nmsu.edu/pubs/_c/C228/welcome.html

All Clothing Publications: 
http://aces.nmsu.edu/pubs/_c/

Original author: Susan Wright, Extension Clothing and Textiles Specialist.

Photo of Wendy Hamilton.

Wendy Hamilton is an Extension Evaluation and Accountability Specialist at New Mexico State University who provides expertise for program development and evaluation. She has worked at four land-grant universities, and has a diverse background in textiles and clothing, adult education, 4-H youth-at-risk, horticulture, evaluation, and grant writing.


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Revised April 2015