Fit, measuring and alterations · 8 October 2026 · 3 min read
Front rise and back rise: how to measure each
Front rise and back rise measurement explained: where each seam runs on fitted trousers, how to take both on your body or a pair you own, and who needs them.
InspirationTwo seams, one curve
The front rise is the length of the centre front seam of a pair of trousers, from the top of the waistband down to the crotch point where the inside leg seams meet. The back rise is the same seam at the back, from the waistband to that crotch point. Added together they give the total rise, also called the crotch length. On most women the back is noticeably longer, because it has to travel over the seat.
Our trouser fit article explains the seated rise, which tells a tailor how deep the trousers are from waist to crotch. The two seam lengths go further: they show how that depth is shared between front and back. On mid-rise women’s trousers the front seam is often around 9 to 11 inches (23 to 28 cm) and the back around 13 to 15 inches (33 to 38 cm), but body shape moves both a long way.
Measuring the total on your body
Wear leggings or close underwear, and tie a ribbon or a piece of elastic round your waist where you want the trousers to sit. It gives the tape a fixed start and finish.
- Stand straight with your feet slightly apart and your weight even.
- Hold the end of the tape at the centre front, right at the ribbon.
- Pass the tape down between your legs and up the back to the ribbon at the centre back.
- Keep it snug against the body without pulling it into the skin, and read the total.
- Ask a helper to note the reading where the tape crosses directly below the side seam line between your legs. That point splits the total into front and back.
Taking both from trousers you own
Splitting the total on your own body is fiddly, so the simplest source is a pair of non-stretch trousers that sit well on you. Lay them flat and fold one leg back to expose the front seam. Stand the tape on its edge and follow the curve from the top of the waistband down to the point where the four seams meet. Turn the trousers over and do the same at the back.
Write down whether the waistband was included, and say what you would change: a back that pulls down when you sit, or spare fabric pooling under the seat, is as useful to a tailor as the figure itself. Our guide to measuring clothes that fit you covers the other garment measurements to take at the same time.
What the numbers tell a tailor
Each seam fixes a different problem, which is why fitted trousers are drafted with both:
- Back rise too short: the waistband drags down at the back when you sit or bend, and lines radiate from the seat.
- Back rise too long: loose folds gather under the seat.
- Front rise too short: the trousers cut in at the front and feel tight when you sit.
- Front rise too long: fabric bags below the waistband at the front.
- A fuller seat or a rounder tummy: shifts length from one seam to the other, even when the total stays the same.
Who needs them, and how to send them
Front and back rise matter on close cuts in woven fabric: cigarette pants, fitted straight trousers and tailored co-ord trousers. A traditional shalwar, a palazzo or a sharara has a deep, roomy crotch by design, so these figures make little difference there. The trouser size guide lists the measurements we normally ask for.
Our quote form has no rise box, so write both figures in the notes with a label, for example front rise 10 in from a garment, waistband included. With custom stitching the measurements and design are agreed in writing before cutting; send them with your quote request.
Common questions
Is the rise the same as the inseam?
No. The inseam is the inside leg, from the crotch point down to the hem. The rise runs above it, from the crotch point up to the waistband, at the front and at the back.
Why is my back rise so much longer than my front?
The back seam curves out and over the seat, while the front seam drops fairly straight. The fuller the seat, the bigger the difference between the two.
Which pair of trousers should I measure?
Choose a non-stretch pair that sits at the same height on your waist as you want the new trousers to sit. Stretch fabric and a different waist height both give misleading figures.
