How To · Fashion · Outfit Formulas
How to Measure Yourself for Online Shopping
Online shopping doesn't have to be a guessing game. With a soft measuring tape and five minutes, you can capture the dimensions that matter most—then cross-reference them against any brand's size chart.
5 min read · IrisThe gap between your size and the brand's size is often measured in inches—literally. Online retailers use wildly different sizing standards, which means a medium at one label might swim on you while a small feels snug. Rather than playing size roulette, take your own measurements and compare them directly to the retailer's size chart before you buy.
You'll need one tool: a soft measuring tape (the kind used for sewing, not construction). Wear something fitted or go shirtless, stand in front of a mirror, and measure five key points. It takes ten minutes and eliminates most of the return-and-reorder cycle.
A soft measuring tape costs under five dollars and pays for itself in avoided shipping fees.
What you'll need.
- 01Soft measuring tape (fabric, ~$3–5)
- 02Mirror
- 03Notebook or phone to record measurements
- 04Fitted clothing or bare skin
Step one · 2 minutes
Gather your tools and wear the right base layer
Find a soft measuring tape (fabric, not metal). Wear a fitted tank top or sports bra, or measure over bare skin—avoid bulky sweaters or padding. Stand in front of a mirror in good light so you can see the tape position. Have a notebook or phone ready to record measurements as you go.
Keep the measuring tape parallel to the ground at all times. Tilting it up or down will throw off your numbers.
Step two · 1 minute
Measure your bust
Wrap the tape around the fullest part of your chest, keeping it snug but not tight. The tape should sit horizontally across your back and lie flat against your body. Breathe normally and read the measurement where the tape overlaps. This is your bust measurement.
Measure over your bra if you wear one regularly—the bra's structure affects how clothes fit.
Step three · 1 minute
Measure your natural waist and hips
Find your natural waist by bending to one side—the crease is your waist. Measure around this point, keeping the tape level. For hips, measure around the fullest part of your hip and thigh area, usually 7–9 inches below your waist. Keep the tape parallel to the ground and snug but not compressing.
If your measurements vary by half an inch between tries, use the larger number—it's safer for fit.
Step four · 2 minutes
Measure your inseam and rise
For inseam, wear the shoes you plan to wear with the pants (or go barefoot). Stand straight and measure from your inner thigh down to your ankle bone. For rise, measure from the top of your hip bone down to your crotch—this tells you whether a brand's proportions will suit your frame. Both numbers matter for trousers, jeans, and skirts.
If you're between sizes, check the brand's return policy before ordering. Some offer free returns; others charge.
Step five · 1 minute
Measure your sleeve length
Extend one arm at a 90-degree angle to your body, keeping your elbow slightly bent. Measure from the center back of your neck, across your shoulder, down to your wrist bone. This is your sleeve length. It's essential for shirts, dresses, and jackets.
Sleeve length varies wildly between brands. A petite frame might need XS sleeves even in a medium top.
Step six · 3 minutes
Compare your measurements to the brand's size chart
Before you add anything to your cart, scroll to the brand's size chart or fit guide. Most retailers list bust, waist, hip, and inseam for each size. Line up your measurements with the closest match. If your bust is 36 inches and the size medium bust is 35–37 inches, that's your size. If you fall between two sizes, read customer reviews or check the fit description (fitted, relaxed, oversized) to decide.
Bookmark size charts for brands you shop regularly. Screenshot them on your phone so you can compare while browsing.
How to know it works.
You'll know your measurements are accurate when the clothes you order fit without major alterations and you're not returning items due to size mismatch. Most returns happen because shoppers guess at sizes instead of measuring—this method eliminates that guesswork.
Questions at the mirror.
What if I'm between two sizes?
Check the brand's fit description and customer reviews. If the fabric stretches (cotton blends, knits), size down. If it's rigid (structured blazers, raw denim), size up. When in doubt, go larger—tailors can take in, but letting out has limits.
Should I measure over my bra or without it?
Measure the way you'll wear the garment. If you always wear a bra under tops, measure over it. The bra's structure affects how a shirt drapes, so consistency matters.
Do I need to measure every time I shop?
Not if your body hasn't changed. Take measurements once and update them annually or after significant weight shifts. Keep them in your phone for quick reference.
What if the brand doesn't provide a size chart?
Scroll through customer reviews and look for comments about fit. Many shoppers mention whether items run small, true to size, or large. That's your best guide when the brand doesn't publish measurements.