Fit, measuring and alterations · 8 October 2026 · 3 min read
How to measure knee and calf for slim trousers
How to measure calf and knee for cigarette pants and churidars: the knee straight and bent, the calf at its fullest, and the heel figure that decides the hem.
InspirationThe two lower-leg numbers
Measure round the middle of your kneecap twice, once with the leg straight and once with the knee bent, and then round the fullest part of your calf while standing. Slim trousers are cut to follow those lines. If the knee is too tight the trousers strain when you sit; if the calf is too tight they ride up and stay up.
Our guide to measuring for each trouser style names these figures. Here is how to take them.
Measuring the knee, straight and bent
Wear thin leggings or bare legs, and sit on a firm chair for the second reading.
- Straight: stand with your weight even and the leg relaxed. Wrap the tape round the centre of the kneecap, level all the way round.
- Bent: sit with your foot flat on the floor and the knee at roughly a right angle. Measure round the same place.
- The bent figure is usually larger, because the kneecap moves forward and the skin stretches over it. Slim trousers have to allow for this or they bind every time you sit.
- Send both, labelled. The straight figure shapes the line of the leg; the bent one sets the minimum room.
Measuring the calf
Stand with your weight on both feet, not up on your toes, which tightens the muscle. Slide the tape up and down the lower leg until you find the largest reading, usually about a third of the way down from the knee. Measure both legs and send the larger figure.
If you plan to wear the trousers with boots, or over thin leggings in winter, mention it so the tailor can add the room.
The ankle and heel figure
A trouser that narrows below the calf has one more test to pass: getting the foot through. Point your foot slightly and measure diagonally round the back of the heel and over the top of the instep. That is the smallest opening a closed hem can have.
Cigarette pants often end narrower than this, so they need a small slit or zip at the hem. A churidar is cut on the bias and much longer than the leg, so the spare length gathers in rings at the ankle; the calf figure decides whether those rings sit neatly or slide down.
Using a pair you own, and ordering
To check against trousers that sit well, lay them flat and measure straight across the leg at the knee, then at the widest point of the calf, and double each figure. Label them as garment measurements, since they already include ease. The trouser size guide shows the full set, and our thigh measuring guide covers the upper leg.
With custom stitching the cut and measurements are agreed in writing before any cutting. Add the knee, calf and heel figures to the notes on your quote request.
Common questions
Do I need knee and calf measurements for a shalwar?
No. A shalwar is roomy through the leg and gathers at the ankle into a cuff, so only the length and the hem opening matter. Knee and calf figures are for close-cut styles.
Where exactly is the knee line on a pair of trousers?
It is roughly halfway between the crotch and the hem, a little higher on most women. When measuring a pair you own, use the narrowest point between the thigh and the calf if you cannot tell.
My calves are fuller than average. What should I ask for?
Send your calf figure and say that standard slim trousers are usually tight there. The tailor can shape the lower leg to your calf without widening the hem more than you want.
