If you've ever stood in a fitting room wondering why a size 12 fits completely differently between two brands, you're not imagining it. Sizing for girls is one of the most confusing categories in fashion — mostly because growing bodies are all over the map, and brands haven't agreed on a standard.

Why sizing is so inconsistent. Somewhere between kids' sizes and adult sizing, there's a gap that different brands fill differently. Some use numeric kids' sizes (10, 12, 14), others jump straight to adult small/medium/large, and some create their own in-between scale entirely. At The Headliner, you'll see both — bottoms like our Gingham Wide Leg Drawstring Pants run in numeric sizing (0-14), while most tops and dresses run XS-L. Always check the size chart on the specific product page rather than assuming her usual size will translate.

Measure, don't guess. The most reliable way to shop online is with three measurements: chest (around the fullest part), waist (natural waistline, usually just above the belly button), and hips (fullest part). Compare those numbers to the brand's specific size chart.

Pay attention to fit type, not just size. A relaxed style like the Light Wash Relaxed Wide Leg Jean and a fitted piece like the Basic Black Tank in the same size number will feel completely different. If a product description mentions fit style, factor that in before you buy.

When in doubt, size up on tops, true-to-size on bottoms. This isn't a hard rule, but it's a helpful default for growing bodies that are changing quickly.

Read reviews for real-world fit notes. Other parents (and daughters) often mention if something runs small, large, or long — that context is more useful than the size chart alone.

FAQ

Why does sizing vary so much between brands?

There's no industry-standard size chart for this age range the way there is for adult women's sizing. Each brand builds its own scale based on its own fit models, so a size 12 can vary noticeably from store to store.

How do I measure my daughter at home?

Use a soft measuring tape and measure her chest at the fullest point, her natural waist just above the belly button, and her hips at the widest point. Compare those numbers directly to the brand's size chart rather than her usual size.

What should I do if she's between two sizes?

For tops, size up for comfort and room to move. For bottoms, it usually depends on whether you prioritize a closer fit now or a little extra room to grow — check the specific item's fit notes if available.

Does The Headliner use standard kids' sizing?

Not exactly. Sizing varies by category — bottoms often run numeric (0-14) while tops and dresses typically run XS-L — so it's worth checking the size chart on each product page before ordering.