A size 18 isn't the same everywhere — and unlike toddler sizes, most brands cut it differently for girls and boys. Here's where the brands on Little & Youth land with each, taken straight from every brand's own published size chart.
10 brands on Little & Youth publish a girls' size 18. Grouped by where each brand's published height range sits.
The bands shift to the right as brands cut a girls' 18 for taller kids.
These brands cut their size 18 a little smaller — the whole range sits lower — so it fits a slightly shorter or leaner kid. Worth a look if your child runs small for their age.
Justice, Walmart Wonder Nation, and Target Cat & Jack.
These brands land right in the most common range, about 62–64" — the way most brands cut a size 18.
Lands' End Kids, Old Navy, Children's Place, Macy's Epic Threads, and Fabletics.
These brands cut their size 18 a little bigger — the whole range sits higher — so it fits a taller kid, and it often lasts longer before it's outgrown. Worth a look if your child runs tall.
Gap Kids and French Toast.
| Brand | Girls' 18 fits | How it runs |
|---|---|---|
| Justice | 60–62" | Shorter |
| Walmart Wonder Nation | 60–62" | Shorter |
| Target Cat & Jack | 61–63" | Shorter |
| Lands' End Kids | 62–63" | Typical |
| Old Navy | 62–64" | Typical |
| Children's Place | 62½–64" | Typical |
| Macy's Epic Threads | 62½–64½" | Typical |
| Fabletics | 63–65" | Typical |
| Gap Kids | 64–66" | Longer |
| French Toast | 65–66" | Longer |
17 brands on Little & Youth publish a boys' size 18. Grouped by where each brand's published height range sits.
The bands shift to the right as brands cut a boys' 18 for taller kids.
These brands cut their size 18 a little smaller — the whole range sits lower — so it fits a slightly shorter or leaner kid. Worth a look if your child runs small for their age.
Original Penguin Junior, Converse Kids, Fabletics, and Children's Place.
These brands land right in the most common range, about 65–66" — the way most brands cut a size 18.
Brooks Brothers Kids, Target Cat & Jack, JCPenney Thereabouts, U.S. Polo Assn., Walmart Wonder Nation, French Toast, Macy's Epic Threads, Calvin Klein Kids, Gap Kids, and Old Navy.
These brands cut their size 18 a little bigger — the whole range sits higher — so it fits a taller kid, and it often lasts longer before it's outgrown. Worth a look if your child runs tall.
Eddie Bauer, Lands' End Kids, and Lee Jeans.
| Brand | Boys' 18 fits | How it runs |
|---|---|---|
| Original Penguin Junior | 62–63½" | Shorter |
| Converse Kids | 63–65" | Shorter |
| Fabletics | 63–65" | Shorter |
| Children's Place | 64–65½" | Shorter |
| Brooks Brothers Kids | 64–66" | Typical |
| Target Cat & Jack | 64–66" | Typical |
| JCPenney Thereabouts | 65–66" | Typical |
| U.S. Polo Assn. | 65–66" | Typical |
| Walmart Wonder Nation | 64½–66½" | Typical |
| French Toast | 65–66½" | Typical |
| Macy's Epic Threads | 65–66½" | Typical |
| Eddie Bauer | 66½–66½" | Longer |
| Calvin Klein Kids | 64½–67" | Typical |
| Gap Kids | 65–67" | Typical |
| Old Navy | 65–67" | Typical |
| Lands' End Kids | 66–67" | Longer |
| Lee Jeans | 65.25–67.75" | Longer |
It depends on the brand and whether it's cut for a girl or a boy. A girls' size 18 runs bigger at French Toast, Gap Kids, and Fabletics and smaller at Justice, Walmart Wonder Nation, and Target Cat & Jack. A boys' size 18 runs bigger at Lee Jeans, Lands' End Kids, and Old Navy and smaller at Original Penguin Junior, Converse Kids, and Fabletics. Most brands land in between.
Not always. Many brands publish one unisex size 18, but brands that split them cut the two a little differently — a girls' 18 typically fits about 62–64" and a boys' 18 about 65–66". If a brand offers both, check the one that matches your child.
At most brands, a size 18 fits a child roughly 62–64" (girls) or 65–66" (boys) tall. Because height is what actually determines fit, it's worth checking your child's height against the specific brand's size 18 rather than going by age.
A size 18 is designed with older kids and young teens in mind, but age is only a rough guide. Because it's built around height and build, plenty of kids wear a size 18 a year earlier or later than the label suggests — checking height against a specific brand's chart is far more reliable.
After a size 18, most brands move to a size 20 or adult sizing. Sizing can shift noticeably at that step, so it's worth checking the next size's height range rather than assuming it picks up where size 18 left off.
Enter your child's measurements once and Little & Youth shows the size to buy across all 90+ brands on the site — girls' or boys', size 18 or otherwise — each pulled from that brand's own published chart.
Find your child's size →