Why Do My Undies Ride Up? Fixes for Boy Shorts and Marianne
By ARQ – ARQ | Published: 2026-11-01
Category: Product Reviews
Diagnose why your undies ride up and fix it: separate causes for boy shorts and Marianne undies, with practical steps and when to size differently.
Quick answer
Undies ride up when the leg opening or rise doesn't match your hip and waist measurements, or when stretch fabric is pulled too tight. Fix it by checking hip measurement first, sizing for the larger area, and choosing a cut whose coverage matches how you move.
Why boy shorts and Marianne undies ride up differently
Boy shorts ride up most often at the inner leg because a mid-rise, moderate-coverage cut has more fabric to shift when the hip fit is off. Marianne undies have a high-cut leg line and a lower-profile shape, so they tend to creep up at the side seam when the waistband sits too high or the hip is too snug.
The fabric matters too. Boy shorts use a cotton-spandex blend that stretches with movement; Marianne undies use an organic cotton pique knit with plenty of stretch and a piping elastic finish. Both recover well, but neither can compensate for a size that fights your hip measurement.
When to stop adjusting and change the style
If you have tried the hip-first sizing rule and the undies still ride up after a few wears, the cut may be the issue rather than the size. Boy shorts suit people who prefer moderate coverage and a mid-rise waist; Marianne undies suit those who want a narrower, French-cut shape with a high leg line. No amount of washing or stretching will turn one into the other.
Also stop sizing down to get a tighter feel. A smaller size increases tension at the leg opening, which is the opposite of what prevents bunching.
Diagnose your ride-up
- Symptom: bunching at the inner leg (boy shorts): Measure your hips and compare to the sizing chart. If your hip and waist span 3+ sizes, split the difference. Otherwise, choose the size that matches your hip measurement. If the inner leg still bunches after sizing by hip, the moderate-coverage cut may not suit your movement pattern.
- Symptom: creeping at the side seam (Marianne): Check that the waistband sits at your natural mid-to-high rise, not pulled above it. If the side seam creeps, try a size up so the high-cut leg line has room to stay put. If the side seam still creeps in the correct rise, the French-cut shape may not match your hip curve.
- Symptom: waistband rolls or digs: This is usually a sign the size is too small for your hip measurement, even if the waist feels fine. Re-check hip measurement first, then waist. If the waistband still rolls after resizing, the rise is likely wrong for your torso length.
- Symptom: fabric feels tight all over: Cotton-spandex and pique knits recover with wear, but they should not feel restrictive when you first put them on. If they do, size up rather than waiting for stretch. If a larger size feels too loose at the waist, you may need a different cut rather than a different size.
Product facts that affect fit
- BOY SHORTS, pink peppercorn: Mid-rise boy cut with moderate coverage and a self-bound comfortable finish. The moderate coverage gives more fabric at the inner leg, so hip measurement is the key sizing check to stop riding up.
BOY SHORTS, pink peppercorn - MARIANNE UNDIES, black: Mid to high-rise, narrower French-cut undies with a high-cut leg line and silky-soft piping elastic. The high-cut leg line can creep up at the side if the waistband sits too high, so check that the rise matches your torso.
MARIANNE UNDIES, black
