Old Navy
Here’s how Old Navy fits your child compared to other brands you might be considering, so you know before it’s in your cart.
What size is (and isn’t) like Old Navy at other brands?
Find your child’s Old Navy 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.
| Old Navy | Size twinssame number fits the same | Size strangerssame number, different cut |
|---|---|---|
| 12-18M30–32" | Mini Boden↑ longerJoJo Maman Bébé↑ longer | |
| 18-24M32–34" | JoJo Maman Bébé↑ longer | |
| 2T33–36" | ||
| 3T36–39" | ||
| 4T39–42" | Tommy Hilfiger Kids↓ shorterMagnetic Me↓ shorter | |
| 5T42–45" | Tommy Hilfiger Kids↓ shorterCalvin Klein Kids↓ shorterGerber Childrenswear↓ shorterKohl's Jumping Beans↓ shorter | |
| 542–45" | Il Gufo↓ shorterMagnetic Me↓ shorter | |
| 645–49" | Bonpoint↓ shorterIl Gufo↓ shorterConverse Kids↓ shorterU.S. Polo Assn.↓ shorterH&M Kids↓ shorterLacoste Kids↓ shorter+14 more | |
| 749–53" | Converse Kids↓ shorterNext Kids↓ shorterU.S. Polo Assn.↓ shorterH&M Kids↓ shorterJacadi↓ shorterMini Boden↓ shorter+17 more | |
| 853–55" | Il Gufo↓ shorterBonpoint↓ shorterU.S. Polo Assn.↓ shorterLacoste Kids↓ shorterNext Kids↓ shorterJacadi↓ shorter+34 more | |
| 1055–57" | Il Gufo↓ shorterLacoste Kids↓ shorterBonpoint↓ shorterBombas Kids↓ shorterChampion Kids↓ shorterChildren's Place↓ shorter+14 more | |
| 1257–60" | U.S. Polo Assn.↓ shorterH&M Kids↓ shorterBombas Kids↓ shorterChampion Kids↓ shorterChildren's Place↓ shorterColumbia Kids↓ shorter+12 more | |
| 1460–62" | Mango Kids↑ longerPetit Bateau↑ longerMini Boden↑ longerH&M Kids↓ shorterCarter's↓ shorterGymboree↓ shorter+6 more | |
| 1662–64" | Lacoste Kids↑ longerAppaman↑ longerOriginal Penguin Junior↓ shorterJustice↓ shorterWalmart Wonder Nation↓ shorterConverse Kids↑ longer+1 more | |
| 1862–64" | Eddie Bauer↑ longerLee Jeans↑ longerMayoral↑ longerCalvin Klein Kids↑ longerTommy Hilfiger Kids↑ longerFrench Toast↑ longer+7 more |
Sizes shown use Old Navy’s girls’/unisex chart where the brand splits by gender; boys’ sizes at the same number can run slightly taller.
In short
Where labels drift. The exceptions are the “strangers” above — e.g. at size 6, Bonpoint, Il Gufo, Converse Kids cut the same number differently. Check those before you trust the label.
Bottom line: for most sizes, a Old Navy 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 →
Specialty & inclusive fits
Which trimmer, roomier, or adaptive cuts Old Navy 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 Old Navy’s own published chart; the notes here come from public parent discussion.
Old Navy runs small — sizing up is the common advice, especially for babies, and some parents note snug necklines. Within the Gap family it runs notably smaller than Gap itself, so a size that fit in Gap often needs to go up a step here. Fit can vary by item, but “size up” is the safe default.
Based on anecdotal discussion from multiple publicly available online sources; your experience may differ.
Should you buy Old Navy?
Consider it if…
- You want the lowest price of the mainstream brands — value-tier with frequent deep sales.
- You want trend-forward everyday clothes — it leans more current than the plain-basics brands.
- You need extended sizes — it publishes Plus in kids up to 20 Plus, one of the more inclusive body ranges we track.
- You like data to size by — it publishes chest, waist and hips, so you can confirm the cut beyond height.
Think twice if…
- You shop on Amazon — Old Navy isn’t sold there; you’ll buy on oldnavy.com or in stores.
- You want premium fabric or durability — it’s value-tier: great for the price, not an heirloom line.
- You want timeless basics — it’s trend-driven, so styles turn over quickly.
Skip the cross-referencing — let Little & Youth do it.
Enter your child’s measurements once. We’ll show their Old Navy size and their size at 100+ other brands, each from that brand’s own chart.
Find my child’s size →Shop Old Navy ↗A few things parents ask that the chart won’t tell you
How much should I size up in Old Navy?
Usually one size, and most reliably for babies — that’s where the runs-small reputation is strongest and where parents mention snug necklines. Moving within the Gap family, plan to go up a step from Gap to Old Navy. Old Navy publishes chest, waist and hips but no weight, so confirm the jump with those body measurements rather than the age label.
Does Old Navy carry Plus or extended kids’ sizes?
Yes — it publishes Plus sizes in kids up to 20 Plus, which makes it one of the more size-inclusive mainstream brands. The specialty section above flags exactly what it offers.
Where can I buy Old Navy?
On oldnavy.com and in Old Navy stores. It is not sold on Amazon.
Old Navy vs. Gap — which should I buy?
Same parent company, opposite ends. Old Navy is cheaper and more trend-driven but runs small; babyGap costs a bit more, runs roomier, and is a touch nicer. Expect to size up moving from Gap to Old Navy.
What measurements do I need to size Old Navy?
It publishes height, chest, waist, and hips (no weight). Height drives the size; the chest and waist figures help confirm the cut, which matters given the runs-small reputation.
Do Old Navy boys’ and girls’ sizes fit the same?
From the bigger sizes up, Old Navy publishes separate girls’ and boys’ charts, so the same number can differ by gender. The figures on this page use Old Navy’s girls’/unisex chart.