How To · Fashion · Build
How to Measure Yourself for the Perfect Fit
Proper measurements are the foundation of a wardrobe that fits. Here's how to take them yourself—no tailor required, just a tape measure and five minutes.
5 min read · IrisOnline shopping and made-to-measure services have made it possible to build a great wardrobe without ever visiting a fitting room. But they require one thing: accurate measurements. Most fit disasters stem not from bad design but from ordering the wrong size—and that usually means you measured wrong, or didn't measure at all.
The good news: you can measure yourself in under ten minutes with a soft tape measure and a mirror. No special tools. No expertise. Just precision and honesty about where your body actually is, not where you wish it were.
Measure over a fitted layer—a t-shirt or long-sleeve—to account for how clothes will actually sit on your body.
Step one · 1 minute
Gather your tools and dress properly
You'll need a soft fabric tape measure (not a rigid ruler). Wear a fitted t-shirt and underwear—the same layers you'd wear under the clothes you're buying. Stand in front of a mirror so you can see what you're doing. Avoid baggy clothes or heavy sweaters; they'll throw off every measurement. If you're measuring for tailored pieces like dress shirts, wear the undershirt you'd actually wear beneath them.
Soft tape measures cost $3–5 at any drugstore. Don't use a ruler or metal tape; they won't conform to your body.
Step two · 2 minutes
Measure your chest
Wrap the tape around the fullest part of your chest, directly under your armpits. Keep the tape snug but not tight—you should be able to slip one finger underneath. Don't pull it taut or compress your chest. Stand naturally; don't puff out your chest or slouch. Read the measurement where the tape overlaps. This is your chest size, and it's the most important measurement for t-shirts, sweaters, and casual jackets.
If the tape lands between sizes (like 39.5 inches), round up. Fitted clothes should never be tight across the chest.
Step three · 2 minutes
Measure your waist and hips
For waist, measure at the narrowest point—usually just above your hip bones, not where your pants normally sit. Again, keep the tape snug but not compressing. For hips, measure around the fullest part of your buttocks and thighs, keeping the tape level all the way around. Both measurements matter for trousers, shorts, and fitted shirts. Many men find their hip measurement is larger than their waist, which is normal and important for fit.
Don't measure where you want your pants to sit. Measure where your actual body is. Your pants will sit lower than this measurement.
Step four · 2 minutes
Measure your inseam
This determines trouser length. Wear the shoes you'd wear with those pants (flat shoes for casual, dress shoes for formal). Stand with your feet shoulder-width apart. Have someone measure from your inner thigh, where the seam of your pants naturally falls, down to the top of your shoe heel. If you're alone, measure from your crotch to your ankle—then subtract half an inch for the shoe. Write this down; it's your inseam length and rarely changes.
Inseam is the single most common measurement men get wrong. If you can't measure accurately yourself, ask a tailor or a friend to do it.
Step five · 2 minutes
Measure your sleeve length
Bend your arm slightly at the elbow, keeping it relaxed. Measure from the center back of your neck, across your shoulder, down your arm to your wrist bone. This is your sleeve length for dress shirts and jackets. For t-shirts, you can measure from the shoulder seam to your wrist instead—this will be about an inch shorter. Sleeve length varies by brand and cut, so always check the spec sheet before ordering.
Dress shirt sleeves should end at your wrist bone when your arm is at your side. T-shirt sleeves typically end mid-forearm.
Step six · 1 minute
Record and verify your measurements
Write down all five measurements: chest, waist, hips, inseam, and sleeve length. Take a photo of the written list. Before you order anything, double-check each measurement against the brand's size chart. If your chest is 40 inches but the medium is 38–40 and the large is 40–42, you're right on the border—check the reviews to see which way that brand tends to fit. Measurements are only useful if you actually compare them to what you're buying.
Save your measurements in your phone or email. You'll use them again and again.
How to know your measurements are right
The best test is ordering one item and seeing how it fits. If it's too tight or too loose, you'll know immediately where your measurements went wrong. But before that, compare your numbers to a brand you already own and love. Measure a t-shirt or shirt that fits perfectly, and your measurements should be very close to the brand's size chart for that item. If they're not, you either measured wrong or that brand runs unusually small or large.
Questions at the mirror.
What if I'm between sizes?
Check the brand's size chart and read reviews. Some brands run small, others run large. If you're truly between sizes, order the larger size—it's easier to tailor down than up. Chest and shoulders especially should never be tight.
Should I measure over my clothes or under them?
Measure over a fitted t-shirt or the layer you'd wear under the garment you're buying. This accounts for how the fabric will actually sit on your body. Don't measure naked or over baggy clothes.
Do my measurements change?
Your chest, waist, and hip measurements can change with weight gain or loss. Your inseam and sleeve length rarely change unless you gain or lose significant weight. Remeasure every year or after any major lifestyle change.
What if I can't get accurate measurements alone?
Ask a friend to help, or visit a tailor for a quick measurement session (usually free or very cheap). Many menswear brands also offer free measurement guides or video tutorials specific to their sizing.