Primary
Here’s how Primary fits your child compared to other brands you might be considering, so you know before it’s in your cart.
Find your child’s size in Primary
Enter your child’s measurements once — we’ll size them in Primary and at 100+ other brands, each from that brand’s own published chart. Height and weight are required; add chest, waist, hips and inseam to sharpen the fit.
Primary publishes one unisex chart, so that is what we size against.
Your child wears one size in Primary. What should you buy elsewhere?
Pick the size your child wears at Primary to see which brands have the same label and measurements (twins) and which run shorter or longer (strangers) — based on each brand’s own chart.
Show the full cross-brand table (every size)
| Primary | Size twinssame number fits the same | Size strangerssame number, different cut |
|---|---|---|
| NB0–18" | H&M Kids↑ longerCarter's↑ longerLittle Planet by Carter's↑ longerOshKosh B'gosh↑ longerabercrombie kids↑ longerMagnetic Me↑ longer+5 more | |
| 0-318–23" | None — consistent across brands | |
| 3-623–25" | Marks & Spencer↑ longer | |
| 6-925–27" | — | Marks & Spencer↑ longer |
| 6-1225–29" | None — consistent across brands | |
| 9-1227–29" | — | Marks & Spencer↑ longer |
| 12-1829–31" | Marks & Spencer↑ longer | |
| 18-2431–33" | — | Marks & Spencer↑ longer |
| 231–35" | Mango Kids↑ longerLacoste Kids↑ longerMayoral↑ longerNoralee↑ longerHatley↑ longerJacadi↑ longer+2 more | |
| 2-331–38" | JoJo Maman Bébé↑ longerMango Kids↑ longerQuincy Mae↑ longerPrimark Kids↑ longerJoules Kids↑ longerMarks & Spencer↑ longer | |
| 335–38" | ||
| 438–41" | Noralee↑ longerCarter's↑ longerLittle Planet by Carter's↑ longerOshKosh B'gosh↑ longerOtter Avenue↑ longer | |
| 4-538–44" | Carter's↑ longerLittle Planet by Carter's↑ longerOshKosh B'gosh↑ longerJoules Kids↑ longerJoJo Maman Bébé↑ longerMango Kids↑ longer | |
| 541–44" | Polo Ralph Lauren Kids↑ longer | |
| 644–47" | ||
| 6-744–50" | None — consistent across brands | |
| 747–50" | Garnet Hill↑ longerPolo Ralph Lauren Kids↑ longerReebok Kids↑ longerConverse Kids↓ shorterEddie Bauer↑ longerFabletics↑ longer+5 more | |
| 850–53" | Il Gufo↓ shorterBonpoint↓ shorterU.S. Polo Assn.↓ shorterGarnet Hill↑ longerOld Navy↑ longerPolo Ralph Lauren Kids↑ longer+4 more | |
| 1053–56" | ||
| 10-1253–59" | JoJo Maman Bébé↑ longerRylee + Cru↑ longer | |
| 1256–59" | Noralee↑ longerRylee + Cru↑ longerU.S. Polo Assn.↓ shorterMayoral↑ longerHanna Andersson↑ longerJacadi↑ longer+6 more | |
| 1459–62" | Petit Bateau↑ longerLacoste Kids↑ longerMini Mioche↑ longerMonica + Andy↑ longerRylee + Cru↑ longerConverse Kids↑ longer+5 more | |
| 1662–64" | Petit Bateau↑ longerAppaman↑ longerLacoste Kids↑ longerJustice↓ shorterReebok Kids↓ shorterWalmart Wonder Nation↓ shorter+3 more |
In short
Where the number just works. At 0-3, 6-12, 6-7, Primary 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 4-5, Carter's, Little Planet by Carter's, OshKosh B'gosh cut the same number differently. Check those before you trust the label.
Bottom line: for most sizes, a Primary 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 →
Fit & the transitions that trip parents up
Primary-specific things the size number alone won’t tell you — drawn from its own charts.
Everything is unisex, no logos
Primary charts one unisex ladder for all kids — solid colors, no logos — so there’s no separate boys’/girls’ sizing to reconcile.
Fit varies by garment, not one blanket rule
Dresses and hoodies tend to fit true, while leggings and t-shirts run narrower and length can run long — so the right call depends on the piece and your child’s build. It holds color and shape and doesn’t shrink, so once an item fits, it stays that way.
Range labels, plus “+” extended sizes
Sizes are often labelled as ranges (4–5, 6–7). A separate “+” line (6–7+ through 16+) adds room for a bigger or longer fit at the same age.
Specialty & inclusive fits
Which trimmer, roomier, or adaptive cuts Primary publishes alongside its standard sizes.
What shoppers say about the fit
Community consensus
Shopper opinion · not Little & Youth’s measurementThis is what parents report anecdotally — crowd sentiment, not a Little & Youth determination. Our sizing above is computed from Primary’s own published chart; the notes here come from public parent discussion.
Primary’s fit varies by garment more than it runs uniformly big or small. Parents report dresses and hoodies fitting true to size while leggings and t-shirts run narrower, and length can run long — so the right call depends on the specific piece and your child’s build, not one blanket rule. It holds color and shape and doesn’t shrink, so once an item fits, it stays that way.
Based on anecdotal discussion from multiple publicly available online sources; your experience may differ.
Should you buy Primary?
Consider it if…
- You want logo-free basics — solid-color clothes with no slogans, characters or branding, in 20+ colors.
- You like to mix and match — everything is designed to pair, and colors are offered for any kid regardless of gender.
- You want durability — parents report the colors don’t fade or pill and the cotton stays soft; its pajamas get compared to Hanna at a lower price.
- You need an adaptive option — Primary offers sensory-friendly, adaptive pieces alongside its standard line.
Think twice if…
- You want prints and characters — Primary is deliberately plain; that’s the whole point, but it’s not for a kid who wants graphics.
- You’re watching budget — it’s mid-tier; basics start low but a full outfit adds up, so lean on sales.
- You want dressy or occasion wear — it’s solid-color everyday basics, nothing formal.
Skip the cross-referencing — let Little & Youth do it.
Enter your child’s measurements once. We’ll show their Primary size and their size at 100+ other brands, each from that brand’s own chart.
Find my child’s size →Shop Primary ↗A few things parents ask that the chart won’t tell you
How do I size Primary when the fit varies by garment?
Buy to the individual piece, not one rule. Primary sizes per product, often in ranges like 4–5, so match your child’s height and build to the exact item in front of you. Because it doesn’t shrink, once a given style fits you can reorder that size in it with confidence.
What is Primary known for?
Solid-color, logo-free basics — no slogans, no characters — in a wide color range designed to mix and match, offered for any kid regardless of gender.
Does Primary make adaptive clothing?
Yes — it offers sensory-friendly and adaptive pieces alongside its standard basics.
Where can I buy Primary?
On its own site (primary.com) and on Amazon.
What measurements do I need to size Primary?
Primary sizes per product, often in ranges (like 4–5), so match your child’s height and weight to the specific item’s range rather than relying on the age label.
How do I choose between Primary’s regular and Plus cuts?
A Plus is the same numbered size as the regular cut — same length, adjusted through the waist and seat (Plus roomier). So size to your child’s usual Primary number from the chart above, then pick the cut by build: a smaller waist for Slim, a fuller waist and seat for the roomier cuts. You don’t need a separate measurement to choose. Primary also carries an Adaptive line, which is about easy closures and sensory-friendly construction rather than a different cut.