How to Buy Clothes Online That Fit (and Return Less)

To buy clothes online that fit, shop with your measurements rather than your usual size: measure your bust or chest, waist, hips and inseam, compare them with each brand's size chart, and — when the shop lists them — compare garment measurements with a similar piece you own that fits well. Then read the fit notes and fabric composition, because a slim cut or a rigid fabric changes the size you need. Those steps take a few minutes and prevent most returns.

Online shopping removes the fitting room, so you have to bring the fitting room's information with you. Here is how.

Step 1: Know your measurements

Your measurements are the one size system that works across every brand. You need at least:

• Bust or chest
• Natural waist
• Hips
• Inseam
• Neck, for dress shirts
• Foot length, for shoes

If you have not measured recently, our guide on how to measure yourself for clothes walks through each one. Keep the numbers in a note on your phone.

Step 2: Measure a garment you love

Body measurements tell you what you need to fit into. Garment measurements tell you how much room you like. Lay a favorite well-fitting piece flat and measure:

Garment	Measure flat
T-shirt or sweater	Chest width (armpit to armpit), length from shoulder to hem, sleeve length
Shirt	Chest width, shoulder width (seam to seam), sleeve from shoulder seam
Trousers or jeans	Waist width, hip width, rise, inseam, leg opening
Jacket or coat	Shoulder width, chest width, sleeve length, back length
Dress	Bust width, waist width, length from shoulder

Double a flat width to get the circumference. Many online shops list these measurements in a "size and fit" tab; when they do, compare them directly with your favorite piece.

Step 3: Use the brand's chart, not a general one

Every brand cuts for its own customer. A general chart or your usual size is useful as a starting point, but the brand's chart decides. If the brand uses sizes from another country, convert first with the clothing size converter, then check the brand's measurements for that size.

Step 4: Read the fit notes

Product pages often include short phrases with useful information:

Phrase	What it usually means for size choice
"Runs small"	Consider one size up
"Runs large" or "generous fit"	Consider one size down or your usual size
"Slim fit"	Close to the body; size up if you are between sizes
"Relaxed" or "oversized"	Designed to be loose; your usual size gives the intended look
"True to size"	Start with your usual size for that brand
"Model is 178 cm and wears size S"	Compare the model's height and size with yours

Step 5: Check the fabric composition

Fabric changes how forgiving a size is:

• Stretch fabrics (elastane, knits, jersey) adapt to the body and forgive small differences.
• Rigid fabrics (non-stretch denim, linen, poplin, tweed) need an accurate size.
• Natural fibers like cotton and wool may shrink slightly if washed warm; check the care label.

The guide to clothing fabrics explains how each fiber behaves.

Step 6: Decide where fit matters most

When your measurements fall across two sizes, choose by the area that is hardest to alter:

• Jackets and coats: shoulders.
• Shirts and tops: chest and shoulders.
• Trousers and skirts: hips; the waist is easier to take in.
• Dresses: the largest of bust, waist and hips for fitted styles.

Step 7: Use product photos as data

Zoom in on photos to see:

• Where the shoulder seam sits on the model.
• How the hem of a top falls relative to the hips.
• How much break the trousers have on the shoe.
• Whether a fabric looks thick, thin, shiny or matte.

Videos, when available, show how the fabric moves.

Step 8: Shoes need extra care

Shoe sizes vary between brands even more than clothes. Measure your foot length in the evening and compare it with the brand's chart. The shoe size converter converts EU, UK and US sizes and works directly from foot length. If you are between sizes, the larger one is usually the safer choice for closed shoes.

Step 9: Read reviews selectively

Customer reviews can be useful for fit, especially when reviewers mention their height, measurements or usual size. Look for consistent patterns — several people saying the sleeves are long is more meaningful than a single comment. Be skeptical of reviews without specific details.

Step 10: Know the return policy before you order

Check the return period, whether returns are free, and whether you need to keep tags and packaging. Try things on soon after delivery, indoors, with the shoes and underlayers you would wear, and keep the tags on until you are sure.

Worked example

You want slim chinos from a new brand. Your measurements: waist 84 cm (where trousers sit), hips 100 cm, inseam 79 cm. Your best-fitting chinos measure 42 cm across the waist laid flat (84 cm circumference) and 50 cm across the hips (100 cm).

The brand lists garment measurements:

Size	Waist (flat)	Hip (flat)	Inseam
32	41	49	81
33	42.5	50.5	81

Size 33 matches your favorite pair most closely. The inseam is 2 cm longer than you need — an easy hem. The fabric has 2% elastane, so a little ease in the waist is fine.

Pre-order checklist

• Measurements are current
• Compared with the brand's own chart
• Compared garment measurements with a piece that fits well
• Read fit notes and model information
• Checked fabric for stretch or rigidity
• Chosen size based on the hardest-to-alter area
• Return policy confirmed

A first-order strategy for a new brand

When you try a brand for the first time, keep the first order small and simple. Choose one basic item — a T-shirt, a shirt or a pair of trousers — rather than a full outfit. Once you know how the brand's sizing compares with your measurements and your favorite pieces, write it down: "Brand X: tops M, trousers 32, sleeves run long." Future orders become far more predictable, and you avoid returning several items at once.

Common mistakes

Ordering your usual size by habit. Your "usual" size is an average of brands you already know. A new brand deserves a fresh check.

Ignoring the unit. Charts may be in inches or centimeters, and garment measurements may be flat or circumference. Check before comparing.

Trying on in a hurry. Fit problems often appear only when you sit, reach or walk. Move in the garment before deciding.

Keeping things that almost fit. Items that are slightly wrong tend to be worn rarely. If an alteration will not fix it, return it.

Online shopping becomes far less of a gamble once you shop by numbers. Measure yourself, measure what fits, and let each brand's chart — not its label — guide you.