Uniqlo Size Chart

Use garment measurements before letter sizes

The most reliable way to choose Uniqlo clothing is to compare a garment you already like with the measurements listed for the exact item. “S,” “M,” and “L” are labels, not a universal conversion. The same letter can fit differently across a fitted T-shirt, an oversized shirt, a cropped jacket, and a seasonal collaboration. Regional storefronts can also present different ranges and measurements, so avoid treating a label from one country as a promise for another.

Lay a comparable garment flat without stretching it. Measure chest width from underarm to underarm, body length from the highest shoulder point, and sleeve length from the shoulder seam where relevant. For trousers, measure the waist flat, rise, thigh, inseam, and leg opening. Double flat widths only when the retailer’s table asks for a circumference; otherwise compare like with like. This gives a more useful answer than converting from a previous brand’s label.

Build in the ease you want

Start with the finished-garment measurement, then decide how much ease you want. A close base layer needs little extra room; a shirt worn over a T-shirt needs more; an outer layer needs enough space for the garments beneath it. If the item description says “oversized,” compare it to a garment with a similar intended silhouette rather than automatically sizing down. The goal is to match the design’s proportions as well as your body measurement.

For a slim or regular cut, pay particular attention to the largest point of your chest, hip, or upper arm. Pick the size that clears that point comfortably, then use hemming or styling rather than forcing a smaller size for a shorter length. For button-front styles, sit and move your arms after trying on the garment: pulling between buttons or restriction across the back usually means the garment needs more ease.

AIRism, HEATTECH, and layers

Technical base layers are designed for different uses. A close-fitting AIRism item may be chosen for a smooth layer under a shirt, while a HEATTECH piece worn as an everyday top may feel better with additional room. There is no universally correct choice. Decide whether the item is a base layer, a standalone top, or part of a cold-weather stack, then compare the garment dimensions with the amount of ease you use in that role.

For a warm layer, test shoulder movement and the combination you will actually wear. A top that fits perfectly on its own can feel restrictive under a jacket. Conversely, adding too much room to a lightweight base layer can make it bunch. Save the product code and size after a successful purchase; it is a more dependable reference for a later order than a broad claim that the entire brand runs large or small.

Denim, trousers, and altered lengths

For bottoms, separate waist fit from inseam. Measure at your natural wearing position, not necessarily your narrowest waist, and compare the rise with a pair you own. A higher rise can feel tighter at the same labeled waist because it sits on a different part of the body. Check the item’s fabric composition as well: rigid denim and stretch-blend denim will behave differently after an hour of sitting and walking.

Where an item can be altered, confirm the retailer’s current alteration rules before purchasing. An alteration can solve a length issue, but it cannot create room through the seat, thigh, or waist. Try the garment seated, take a normal stride, and check pockets and cuffs before deciding it is the right size.

Five checks before ordering online

1. Open the size table for the exact colour and style, not a similar item.
2. Compare finished-garment measurements with an item you wear often.
3. Choose the amount of ease for layering and the intended silhouette.
4. Check fabric composition, stretch, rise, and available length options.
5. Keep the product page and return policy available until you have tried the item on.

This page is an independent sizing reference, not an official Uniqlo size chart. Product measurements, fit descriptions, and regional availability change over time; use the current Uniqlo listing as the purchase decision source.

Keep the comparison repeatable

Use the same tape, flat surface, and reference garment whenever you compare a later order. Record whether a width is flat or doubled and whether the reference item has been washed. That small record avoids a common online-shopping error: treating a number taken from a stretched knit as though it were a body measurement. It also makes it easy to identify whether a later difference comes from a changed cut, a different fabric, or simply a different intended fit.

Kids’ sizes follow the same measurement logic

Uniqlo’s kids’ range uses height-based labels for younger children and moves toward letter or numeric sizes for older kids. Measure standing height and compare it with the item’s height range rather than age, since children of the same age differ widely. Leave only the growth allowance that the specific garment tolerates: too much room in a jacket changes sleeve length and shoulder position, and too little in trousers is immediately uncomfortable. Check the exact item’s table rather than scaling down the adult chart, because proportions, not just length, change with age.