CrossFit leggings should sit snug at the waist and hips — flat, not compressive — and pass a full-depth squat test without slipping or going sheer.
A legging that fits for a deadlift can still fail on a box jump. The gap between “feels okay in the dressing room” and “stays put through a WOD” comes down to three tape measurements and one movement test. Measure your waist, hips, and inseam, match them to the brand’s own chart, size up when you land between two sizes, then squat in them before you commit.
How Do You Measure For CrossFit Leggings?
Measure the narrowest part of your waist, the fullest part of your hips, and your inseam from crotch to ankle — then match those numbers to the brand’s own chart, because sizing is not universal.
Nike measures waist at its narrowest point and hips at their fullest. Adidas adds inseam and leg length, which matters for a sport cycling through squats, lunges, and jumps.
Four measurement mistakes account for most bad fits:
- Measuring over loose clothing. A hoodie or jeans adds inches that don’t exist. Measure against bare skin or thin base layers.
- Pulling the tape too tight. A cinched tape reads smaller than your body, and you’ll order a size that restricts movement.
- Buying by dress size. A 6 in one brand is not a 6 in another. Waist-and-hip numbers are the only reliable match.
- Ignoring inseam. Length decides whether the hem sits at your ankle or bunches above it mid-WOD.
Brand charts only work for that brand. A “medium” from Nike and one from Adidas can measure differently at the waist and hips, so pull the chart for whichever pair you’re considering.
Women’s Leggings Size Chart: Waist And Hip Ranges
Use the numbers below as a starting reference, then confirm against the specific brand’s chart — ranges overlap between sizes, and the overlap is where most fit problems start.
| Size Reference | Waist Range | Hip Range |
|---|---|---|
| Nike XS (smallest listed) | 21.25–23.5 in | 30.5–33 in |
| Nike largest listed | 38.5–42.5 in | 47–50 in |
| Adidas XS | 24–27.2 in | 33.9–35.8 in |
| Adidas XL | Up to 35.8 in | 42.9–46.1 in |
| US 00/0 (alpha XS) | 23–24 in | 32–33 in |
| US 22 (alpha XXL) | 40–42 in | 49–51 in |
Adidas also lists inseam at 26.8–27.6 in depending on size. Length categories run about 29 in for short/petite, 31.5 in for regular, and 33.5 in for tall.
If your waist lands in one size and your hips in the next, take the bigger size. A slightly loose hip usually still passes a squat test. A waistband that digs in will not, and it’s the reason leggings roll down mid-set.
Will They Stay Put Through A WOD?
The only fit test that matters for CrossFit is full-range movement: squat to depth, lunge, jump, and check for transparency, rolling, and seam pull. Leggings that pass fit correctly; leggings that don’t won’t improve with wear.
The squat check does three jobs: whether the waistband stays flat when you hinge, whether the fabric goes sheer under stretch, and whether seams pull across the hips. If any happen in the fitting room, they’ll happen under a loaded barbell.
Fit targets worth remembering:
- Snug at the waist and hips, with no gaping or bunching
- No compression that restricts your range of motion
- Fabric that stays opaque at the bottom of a squat
- Hem that sits at the ankle rather than riding up
Too-small leggings feel overly compressive and can limit how deep you sit. Too-large leggings slip during lifts and fail the movement test. Brand guides land on the same phrasing: snug, not tight. If you want tested options that already clear these markers, our shortlist of crossfit leggings that pass the squat test covers the ones we’d actually train in. Sizing up also protects the seams — a stretched-to-max legging is the one that goes sheer on a heavy set.
Sizing Between Sizes And Brand Differences
Two rules cover most of it: size up when you’re between sizes, and trust the brand’s own chart over any general size you’ve worn before. Nike’s waist and hip method and Adidas’s waist, hip, and inseam method can both be correct and still disagree on what a “medium” measures. Charts describe that brand’s pattern, not a universal standard.
The three official guides behind this article are Nike’s women’s leggings size guide, the Adidas women’s leggings size chart, and a US leggings size conversion chart mapping dress sizes 00/0 through 22 to XS–XXL.
FAQs
Should I size up or down if I’m between sizes?
Size up. A slightly larger pair usually still passes a squat and mobility check, while a smaller pair can restrict your range of motion and digs into the waist. The overlap between two sizes is exactly where the bigger one serves you better for training.
Why does a medium fit differently across brands?
Because size charts describe each brand’s own pattern, not a shared standard. Waist and hip ranges for the same alpha size can differ by several inches between two brands. Always match your measurements to the chart for that specific pair, not to the size you normally wear.
How do I know if leggings are too tight for CrossFit?
If you feel compression that limits how deep you can squat, or the waistband leaves marks and rolls down mid-movement, they’re too tight. The target is snug at the waist and hips without restricting movement — brands describe this as snug, not tight.
References & Sources
- Nike. “Women’s Leggings Size Chart.” Waist and hip measurement method and size ranges.
- Adidas. “Women’s Leggings & Tights Size Chart.” Waist, hip, and inseam ranges by size.
- SizeChart.com. “Leggings Size Chart — US.” US dress size to alpha size conversion with waist and hip ranges.