Black athletic pants fit right when your waist, hip, and inseam measurements match the specific brand’s current chart — color never changes the size system.
A waistband that digs in or an ankle that puddles ruins a pair you otherwise love. Getting fit right comes down to three numbers and one chart, measured in about five minutes with a cloth tape. This guide covers the measuring process, the between-size rules Nike and Carhartt publish, and the mistakes that send people back to the returns counter.
How Do You Measure For Athletic Pants?
Measure over undergarments or close-fitting clothing with a flexible cloth tape kept level and comfortably snug — never pulled tight. Vans advises standing naturally, keeping the tape horizontal, and double-checking each measurement. Round to the nearest half inch.
- Waist: Run the tape around where the waistband normally sits. Nike specifies the narrowest part of the waist; Carhartt suggests bending sideways to find your natural crease.
- Hips or seat: Measure around the fullest part of the hips, tape level all the way around.
- Inseam: Measure from the crotch area down the inner leg to your desired hem. Nike defines garment inseam as crotch to hem.
Measuring a pair you own works too: fasten buttons and zipper, lay pants flat, smooth the fabric, and run the tape from the crotch seam down the inside leg to the hem.
Reading Men’s And Women’s Size Charts
US men’s pants list waist first and inseam second, so 32×34 means a 32-inch waist and 34-inch inseam. Women’s pants usually use numeric or alpha sizing, and hip often decides the size when waist and hip point in different directions.
| Size System | Listed Range | What Decides Your Size |
|---|---|---|
| Nike men’s numeric | 26–48, waist 27.5–49.5 in, hip 33.5–55.5 in | Hip measurement wins if waist and hip disagree |
| Carhartt men’s | Waist 28–54, hip/seat 34–60 in | Waist measurement equals the nominal size |
| US men’s typical | Waist 24–60 in, inseam 28–38 in | Measure your leg, never guess from height |
| Women’s numeric | Sizes 0–24, waist 23.5–41 in | Waist plus hip on the brand’s chart |
| Women’s alpha | XXS–XL, natural waist 24–34.5 in | Hip measurement for the final call |
| Carhartt inseam rounding | 27–28 in → order 28 | Round to the listed length |
| Carhartt inseam rounding | 33–34 in → order 34 | Round to the listed length |
Nike labels its chart numbers as body measurements, not finished-garment measurements; Carhartt’s listed waist numbers match the nominal size. Check each product page to confirm which you’re reading.
What If You’re Between Sizes?
Nike says size down for a tighter fit and up for a looser one, and to trust the hip measurement when waist and hip suggest different sizes. Carhartt advises ordering the larger size when a measurement falls between sizes, and rounding up to the longer inseam between listed options.
A belt can take up slack if you size up, making the larger size the safer pick for most people. The fit should allow normal movement without waistband compression, crotch restriction, or fabric piling at the ankle — check these in a mirror; no chart captures them.
Color isn’t a sizing category. Black athletic pants follow the same charts as every other color in the same model. To compare specific pairs, our roundup of the best black athletic pants for everyday wear covers fit notes and fabric differences side by side.
Brand charts recommend sizes from body measurements, while cut, rise, stretch, and intended fit vary by model. Nike’s published guidance is a good reference: Nike’s men’s bottoms numeric size chart lists its numbers as body measurements, which is why your own tape beats any assumption.
Common Measuring Mistakes To Avoid
- Measuring over bulky clothing instead of undergarments or a thin layer.
- Pulling the tape tight, letting it slope, or shifting posture mid-measurement.
- Confusing inseam with outseam — inseam runs crotch to hem, outseam waistband to hem.
- Assuming a nominal size means the same across brands; sizes vary slightly.
- Using only your waist when the chart also asks for hips or seat.
- Choosing an inseam from your height instead of measuring your leg or a well-fitting pair.
Stretch fabric, elastic waistbands, drawcords, cuffs, and different rises all change how a match feels even when numbers line up. Record your waist, hip, and inseam and compare all three against the exact product chart before every order.
Common Questions
Does the color of athletic pants change the size I should order?
No. Color has no effect on sizing, and brand charts don’t publish separate size systems by colorway. A black pair and a gray pair of the same model use identical measurements. Pick your size from the brand’s chart and the model’s fit description, then choose any color.
Which measurement matters most when my waist and hip point to different sizes?
Go with the hip measurement. Nike’s guidance states that when waist and hip suggest different sizes, the hip decides. This matters most for athletic and tapered cuts, where the seat and thigh carry the fit. Carhartt takes the opposite approach on borderline numbers and recommends ordering the larger size.
Can I just order my usual jean size in athletic pants?
Not reliably. Clothing sizes vary between brands, and cut, rise, stretch, and intended fit differ by model. Your usual jean size is a starting point, not a guarantee. Measure your waist, hip, and inseam, then compare all three against that product’s chart before ordering.
Sources
- Nike. “Men’s Bottoms (Numeric Sizing) Size Chart” Source for men’s waist and hip ranges, body versus garment measurements, and the between-size and hip-wins rules.
- Vans. “How to Measure for Pants” Source for the measuring procedure, posture and tape-level guidance, and double-checking measurements.
- Carhartt. “Size & Fit Guide” Source for men’s waist and hip ranges, inseam rounding groups, and the order-the-larger-size guidance.