How to Test a Leggings Sample Before Bulk Production
A leggings sample is your chance to find fit and fabric problems before they are repeated in every piece of bulk. This guide shows how to test a leggings sample in about a week: measure it, wear it, squat in it, wash it and send clear comments back to your manufacturer.
- Measure before you try it on, against your size chart.
- Wear it in real workouts, not only in front of a mirror.
- Squat in daylight to check opacity.
- Wash it and measure again to check shrinkage and shape.
- Send comments in writing, with measurements and photos.
What to have ready
Before the sample arrives, have these on hand so you can test it the same day:
- Your measurement chart and tolerances, ideally in your tech pack. Our tech pack checklist shows what to include.
- A soft tape measure and a flat table.
- A fit model who matches your sample size, usually S or M.
- Good daylight and a phone camera.
- A simple comment sheet with spec, actual and difference columns.
Step 1: Measure the sample
Lay the leggings flat without stretching them and measure the main points against your chart. Measure twice if a number looks wrong.
| Point | How to measure | Why it matters |
|---|---|---|
| Waist | Straight across the top edge of the waistband, relaxed | Too tight digs in; too loose slips down |
| Hip | Straight across at the agreed distance below the waist | Affects fit and opacity over the seat |
| Front rise | From the crotch seam to the top of the front waist | Too short can pull at the front |
| Back rise | From the crotch seam to the top of the back waist | Too short can gap or slide down in a squat |
| Thigh | Straight across, just below the crotch | Affects compression and comfort |
| Inseam | From the crotch seam to the hem | Sets full, 7/8 or capri length |
| Leg opening | Straight across the hem, relaxed | Affects how the hem sits on the ankle |
Many brands work with about ±1 cm on length and width points and ±0.5 cm on smaller points. Agree your own tolerances in writing before sampling, so everyone checks against the same numbers.
Step 2: Fit and wear test
A try-on shows the first impression. A wear test shows how the leggings behave after an hour of training.
- Stand still. Check that the waistband lies flat, the side seams run straight and there is no gap at the back waist.
- Squat and lunge. The waistband should stay up and not roll down. The back rise should not slide.
- Run and jump. Check whether the leggings slip, and whether a phone stays in the pocket.
- Sit for a while. Look for the waistband digging in or the front rise pulling.
- Train in them. Use them for three or four real workouts and note any rubbing at seams or the gusset.
Ask the fit model to write down what they feel, not just what they see. Comments such as “the waistband rolls after 20 minutes” are much easier to fix than “the waist feels wrong”.
Step 3: Squat test for opacity
Do a deep squat in daylight, facing away from a window, and take a photo of the seat and inner thigh. If you can see skin or underwear, the fabric is not opaque enough at that stretch. Our squat-proof leggings guide explains what affects opacity.
Light colors are usually more see-through than black, so test opacity in your bulk color or a close match.
Step 4: Stretch, recovery and seams
- Stretch and release: pull the waistband and the leg firmly, then let go. The fabric should return to its shape without bagging.
- Knees and seat: after a workout, check whether the knees or seat have lost shape.
- Seams under stretch: stretch each seam. Stitches should not crack, pop or show gaps. See our seam guide for what to look for.
- Gusset and waistband joins: check that these stress points are secure and smooth inside.
Step 5: Wash and measure again
- Measure first. Record waist, hip, inseam and leg opening.
- Wash and dry it. Follow the care label you plan to use.
- Let it rest. Lay it flat for a few hours before measuring.
- Measure again. Compare the results with your first measurements.
- Check the shape. Look for twisted side seams, wavy waistbands and changes to logos or prints.
Agree a shrinkage limit in your tech pack. For knit leggings, many brands work with a limit of around 3% to 5%, depending on the fabric.
Pilling and colorfastness
Pilling usually shows first on the inner thighs, where the legs rub together. After a few workouts, look at that area in good light. For colorfastness, rub a damp white cloth on the fabric and check for color transfer. These quick checks can show a risk, but they are not test results.
Quick checks and lab tests
| Check | Quick check | Lab test example |
|---|---|---|
| Shrinkage | Measure, wash and measure again | ISO 6330 with ISO 5077, or AATCC 135 |
| Pilling | Look at the inner thighs after wear | ISO 12945-1 or ISO 12945-2 |
| Colorfastness to sweat | Damp white cloth | ISO 105-E04 or AATCC 15 |
| Colorfastness to rubbing | Dry and damp white cloth | ISO 105-X12 or AATCC 8 |
| Stretch and recovery | Stretch and release by hand | EN 14704-1 or ASTM D2594 |
Lab tests are worth it for a new fabric, dark or bright colors, or when a retailer asks for reports. Our nylon vs polyester guide explains how the fabric choice affects feel, pilling and price.
How to send sample comments
Put all comments in one document per sample round, so nothing is lost in chat messages.
- Measurements: a table with spec, actual and difference for each point.
- Photos: front, back and side, plus close-ups with the problem marked.
- Priority: mark each comment as must fix or nice to have.
- Decision: approved, approved with comments, or new sample needed.
At MIDYOGA, sample revisions are free and each sample takes about 12–15 days, so clear comments save a full round. Our sampling process guide explains each stage.
When to approve the sample
- Measurements are within tolerance.
- It passes the squat test in the bulk color or a close match.
- The waistband stays up during a workout.
- Seams stay intact when stretched.
- Size and shape hold after washing.
- The logo and trims look right after washing.
Approve the sample in writing and keep it as the reference for bulk. Ask your manufacturer to keep a matching approved sample, and use it with our quality control checklist when bulk is inspected.
Common mistakes
- Trying the sample on without measuring it first.
- Testing only in front of a mirror, not in a workout.
- Checking opacity in black when bulk is a light color.
- Skipping the wash test.
- Sending comments in scattered chat messages.
- Changing the fabric after the fit is approved without a new sample.
Planning a leggings line? See our custom leggings manufacturing page for styles, fabrics and MOQ.
Frequently asked questions
How long should I wear test a leggings sample?
Wear it for at least three or four real workouts across about a week, and wash it at least once. A short try-on shows fit, but problems such as a waistband rolling down, seams rubbing or pilling usually appear only with use.
Which size should my leggings sample be?
Most brands sample in their base size, usually S or M, and check it on a fit model who matches that size. If fit is critical across a wide size range, ask your manufacturer whether a size set can be made before bulk.
Do I need lab tests for a leggings sample?
Quick checks at home find obvious problems, but they are not test results. Lab tests are worth it for a new fabric, dark or bright colors, or when a retailer asks for reports. Tests such as shrinkage, pilling and colorfastness give results you can compare.
How many sample rounds are normal for leggings?
Often one or two. A third round is common when the fit changes a lot or the fabric is switched. Clear written comments with measurements and photos are the best way to keep rounds down.
Can I test the sample in a different color from bulk?
You can check fit and construction in any color, but not opacity or colorfastness. Light colors can be more see-through, and dark or bright colors are more likely to bleed, so test those in the bulk color or a close match.
Ready to sample your leggings?
Send your tech pack or reference style, plus the fabric and colors you have in mind. We review them and reply with a quote within 24 hours. Only your work email is required.
- A tech packShare technical drawings, measurements and material requirements.
- A reference productShare a photo, product link or sample, with the details you want to develop.
- An early ideaDescribe the category, intended activity and wearing experience.