Fit is the number one driver of denim returns, and fit names are unregulated marketing. The fix is defining each fit by its block — the set of critical measurements that stay constant across sizes. Here are the five canonical fits with the numbers that define them.
The Five Fits (Men's Reference, Size 32)
| Fit | Thigh | Knee | Leg opening | Character |
|---|---|---|---|---|
| Skinny | ~21 cm | ~17 cm | ~15 cm | Full contact, stretch fabric advised |
| Slim | ~23 cm | ~18.5 cm | ~16.5 cm | Close through thigh, room at calf |
| Tapered | ~25 cm | ~19 cm | ~17 cm | Room up top, narrows below knee |
| Straight | ~25.5 cm | ~21 cm | ~20 cm | Uniform tube, the classic |
| Relaxed | ~28 cm+ | ~24 cm | ~22 cm | Workwear volume |
Rise: The Forgotten Third of Fit
Leg shape gets the attention, but rise decides where the jean sits — and it is where "same size" jeans diverge most between brands. Low rise (<25 cm front), regular (25–28 cm), high (>28 cm). Raw denim buyers skew high-rise: more fabric to crease, better waist hold after stretch.
Building a Block That Cuts Returns
- Pick a base block and modify, rather than inventing from scratch — proven blocks carry decades of wear data.
- Grade with a rule: define how each measurement grows per size (commonly 1.27 cm / half inch per waist step) and apply it consistently.
- Publish actual measurements on the product page, by size — not just "fits true to size." This single change reduces returns measurably.
- Fit-test on bodies, not mannequins — at least three sizes on three builds, sitting and standing.
Women's Blocks Deserve Their Own
Do not grade down a men's block and call it women's. Hip spring, waist-to-hip ratio, and thigh curves differ structurally — which is why "unisex" denim fits one sex and apologies to the other.