Even when purchasing a standard pair of trousers, getting the right fit is important. There’s nothing worse than ill-fitting trousers spoiling your ensemble – no matter whether they’re too short, too long, too tight, or too loose.
Spending a little more on a pair that fits you perfectly will save you money down the line. The better they fit, the more you’ll wear them — and the longer they’ll last.
In this guide, we’ll show you our top tips for measuring, the six key measurements you’ll need, and how to adjust for different styles, fabrics, and body types. It might seem complicated now, but getting it right beforehand will make shopping so much easier.
How to Measure for Trousers: 6 Top Tips
Before you start taking any measurements, allow us to share our best pieces of advice.
- Always use a soft tape measure for accurate measurements. They’re easier to move around than a metal or paper version and much more reliable. If you don’t have one, they’re inexpensive and handy to keep around.
- Stick with either centimetres or inches. It might sound silly but you’d be surprised how many people mix the two! Jot everything down in one format — you can always convert later.
- Wear your favourite trousers to get accurate figures. You’ll know where they sit best, if they’re too long or short, and how much wiggle room you like.
- Hold the tape taut but not tight. Pulling it too tight will give you a false reading — and you’ll end up with trousers you can’t even sit down in.
- Keep relaxed. Don’t breathe in to try and shave off inches — you’ll only end up with trousers that are too snug.
- Recruit a helping hand. It’s much easier when someone else measures you. You’ll get more accurate numbers and you won’t be tempted to adjust them in your favour!
The Six Key Measurements to Take
While you can measure your trousers, it’s much better to measure your body — this gives a more accurate result, especially when shopping for different brands or getting trousers made to measure.
These six are the essentials — the same ones a tailor would take — whether you’re buying off the rack or online:
1. Waistband
Probably the most important measurement. Wear your favourite trousers to see how high or low you naturally wear them. Most of us wear trousers around the belly button, but it varies. Loop the tape measure around that spot — not too tight.
2. Hip/Seat Width
Often overlooked, but crucial for comfort. Measure around the widest part of your hips or around the bottom of your trouser pockets. It’ll help avoid that dreaded too-tight feeling when you sit down.
3. Inside Leg
Essential for getting the right length. Measure from your crotch to your ankle bone. Trousers that are too short or too long won’t sit right — especially for formalwear or jeans.
4. Outside Leg
Less commonly used, but helpful for tailored or high-rise styles. Measure from the top of the waistband to the bottom of the leg. It gives you a fuller idea of how trousers will sit overall.
5. Rise
Rather than measuring again, calculate this by subtracting your inside leg from your outside leg. It tells you how high the trousers will sit. Most men’s trousers have a regular rise of 9–11 inches, but shorter or taller frames may need low- or high-rise options.
6. Across the Thigh
Not a standard measurement, but useful if you have athletic or stockier legs. Measure about three inches below the crotch around your thigh. This will help you avoid trousers that look or feel like skinny jeans — unless that’s the style you want!
Measuring for Different Trouser Styles
Different cuts mean different fits. Here’s how to measure with each in mind:
- Slim Fit – Sits closer to the body, especially at the thigh and calf. Be honest with hip and thigh measurements to avoid tightness.
- Regular Fit – Balanced through the leg and seat. Stick to your true measurements for a classic, comfortable fit.
- Relaxed Fit – Offers extra room through the leg. Ideal for larger builds or those wanting more freedom of movement.
- Tailored Fit – Structured but not tight. Check waistband and rise measurements carefully to avoid gaping or pulling.
Fabric Matters: Stretch vs. Non-Stretch
Different materials affect how trousers fit:
- Stretch fabrics (think elastane-blend chinos or jeans) provide flexibility and comfort. You might get away with a slimmer fit or a smaller size.
- Non-stretch fabrics (100% cotton, moleskin, or tweed) require more precision. Go looser if in doubt.
- Heavier fabrics hold structure but can feel bulkier. Be sure your measurements allow for layering or movement.
Common Fit Problems & Quick Fixes
Even with the right numbers, these issues can crop up:
- Too tight in the thighs? Try a straight or relaxed fit. Double-check thigh and hip measurements.
- Gaping waistband? Opt for adjustable waist styles or add a belt. Some body types (curvier hips or fuller posterior) need extra waist shaping.
- Incorrect leg length? If in between sizes, go longer — you can always get them hemmed.
- Too tight when sitting? Check your hip and rise measurements again. A slightly higher rise can offer more comfort.
Adjusting for Different Body Types
A few tweaks can help make trousers more flattering and comfortable:
- Tall builds – Prioritise longer inside leg and regular rise. Avoid trousers that cut too short at the ankle.
- Shorter builds – Choose mid- or high-rise styles to lengthen the legs. Stick to slimmer cuts.
- Athletic builds – Go for relaxed thigh fits and tapered legs for balance.
- Fuller figures – High-rise trousers with stretch fabrics are usually the most flattering and forgiving around the middle.
Perfecting how to measure for trousers can be tricky. It’s often trial and error to find the right fit — not just for your body, but for the occasion, too! We recommend trying on several pairs before settling on the perfect one, and moving around in them to test comfort.
Ready to put those measurements to good use? Discover high-quality trousers designed for life in the country — from everyday chinos and moleskin trousers to durable workwear and weekend jeans – we’ve got them all in our men’s and ladies’ collections.