Here’s how Uniqlo Kids fits your child compared to other brands you might be considering, so you know before it’s in your cart.
Find your child’s Uniqlo Kids size on the left. Twins wear the same number the same way — your size carries straight over. Strangers use the same number but cut it shorter or longer, so don’t trust the label alone.
| Uniqlo Kids | Size twinssame number fits the same | Size strangerssame number, different cut |
|---|---|---|
| 3-441.5–45" | — | Joules Kids↓ shorterMarks & Spencer↓ shorterNew Balance Kids↓ shorterZara Kids↓ shorterPrimark Kids↓ shorterJoJo Maman Bébé↓ shorter |
| 5-645–49" | Joules Kids↓ shorterPrimark Kids↓ shorterMarks & Spencer↓ shorterNew Balance Kids↓ shorterZara Kids↓ shorterAdidas Kids↓ shorter | |
| 7-849–53" | ||
| 9-1053–57" | Zara Kids↓ shorter | |
| 11-1257–61" | Zara Kids↓ shorter | |
| 1361–65" | None — a universal size |
Where the number just works. At 13, Uniqlo Kids lines up with every brand we track — the size carries straight over.
Where labels drift. The exceptions are the “strangers” above — e.g. at size 7-8, Marks & Spencer, Zara Kids, Primark Kids cut the same number differently. Check those before you trust the label.
Bottom line: for most sizes, a Uniqlo Kids number is a safe bet elsewhere — measure once, then double-check only the handful of “stranger” brands above.
Curious about a size that isn’t your child’s here? Every size, compared across every brand, lives here: Browse all size comparisons →
Which trimmer, roomier, or adaptive cuts Uniqlo Kids publishes alongside its standard sizes.
This is what parents report anecdotally — crowd sentiment, not a Little & Youth determination. Our sizing above is computed from Uniqlo Kids’ own published chart; the notes here come from public parent discussion.
Uniqlo Kids runs small and slim. Most US kids size up one, and broader or taller kids sometimes two. It uses Japanese, centimeter-based sizing (100–160 cm) cut narrow through the body, so a size reads snugger and shorter than the roomy US basics brands. Parents warn the online size-assistant is unreliable, so size off your child’s real height and chest against the cm chart. Note there are no baby or toddler sizes — the line starts around 100 cm (age 3–4).
Based on anecdotal discussion from multiple publicly available online sources; your experience may differ.
Enter your child’s measurements once. We’ll show their Uniqlo Kids size and their size at 100+ other brands, each from that brand’s own chart.
Find my child’s size →Shop Uniqlo Kids ↗Uniqlo uses Japanese, height-based sizing in centimeters (100–160 cm; 110 ≈ age 4–5). Our comparison converts it from real height, and you can switch this page between inches and centimeters with the toggle above the table.
Parents report it’s unreliable — size off your child’s actual height and chest against the cm chart instead. Because Uniqlo runs slim, round up when your child is between sizes or broad through the body.
Uniqlo Kids publishes height, chest, waist in its size chart. Height is the primary driver, and the chest/waist figures let you confirm body fit for a child between sizes.
Uniqlo Kids is sold direct and through select retailers — it isn’t carried on third-party marketplaces like Amazon.