Old Navy Girls' Size Chart
Complete girls' sizing guide for Old Navy with measurements, fit tips, and conversions
Use this girls size chart to compare your measurements against Old Navy's official sizing. Each table shows body measurements and international conversions.
Fit Notes
Old Navy runs a generous American block — probably the most forgiving sizing in the mall-tier segment, with a wider chest and hip allowance than any other Gap Inc. brand. Their published size ranges are wider than Gap's for the same nominal label, which is why the same size number feels roomier here even when the tag reads identical. Women's jeans in particular are drafted with more hip and thigh than the industry average, so straight-size shoppers with athletic legs tend to find Old Navy easier than most competitors. Kids' clothing carries the most generous age-band sizing of the major US brands.
Common Sizing Mistakes
The main pitfall is ordering the buyer's usual Gap or Banana Republic size and finding the Old Navy version too loose — Old Navy is genuinely half a size more generous in tops, and buyers migrating in from those brands should typically size down. Kids' sizing is sold in age bands, but Old Navy's bands skew large, so the '5T' will fit many four-year-olds better than most competitors' 5T. A third mistake is assuming the StretchTech and Pixie pant lines use the core block — both are drafted slimmer through the leg than the standard chino.
How Old Navy Compares
Old Navy is the most relaxed of the Gap Inc. brands: looser than Gap, considerably looser than Banana Republic, and roughly one full size more generous than Zara or Uniqlo for the same S/M/L label. Against Target's Universal Thread and Goodfellow lines — the nearest big-box comparison — Old Navy sits slightly roomier through the chest and comparable in the waist. Against H&M's Modern Classic, Old Navy runs about half a size larger and noticeably longer in the sleeve.
Size data referenced from Old Navy's size charts, last verified July 2026.
Last updated: Q3 2026 · Reviewed quarterly by JC, SizeHub editor
Kids' Sizing
Clothing — Children (4–7 Years)
| Size | US | Height (in) | Waist (in) | Hip (in) |
|---|---|---|---|---|
| XS | 5 | 42–45 | 22.5 | 24.25 |
| S | 6/7 | 45–51 | 23–23.5 | 25.5–26.75 |
| M | 8 | 51–54 | 24 | 28 |
| L | 10/12 | 54–60 | 25.25–26.5 | 29.25–30.5 |
| XL | 14/16 | 60–65 | 28–29.5 | 32–33.5 |
| XXL | 18/20 | 65–67 | 31 | 35 |
Clothing — Youth & Teens (8–16 Years)
| Size | US | Height (in) | Waist (in) | Hip (in) |
|---|---|---|---|---|
| XS (Girls) | 5 | 42–45 | 22 | 24 |
| S (Girls) | 6/7 | 45–53 | 22.5–23 | 25.5–27 |
| M (Girls) | 8 | 53–55 | 23.5 | 28.5 |
| L (Girls) | 10/12 | 55–60 | 24.5–25.5 | 30.25–32 |
| XL (Girls) | 14/16 | 60–64 | 26.5–27.5 | 33.75–35.5 |
| XXL (Girls) | 18/20 | 62–64 | 28.5 | 37.25 |
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Frequently Asked Questions
Does Old Navy run large?
Yes, Old Navy tends to run slightly large. Consider sizing down if you prefer a more fitted look.
How does Old Navy compare to Gap?
They're very similar since they're owned by the same company, but Old Navy can run slightly more generous.
Is Old Navy true to size?
Old Navy is generally true to size or slightly generous. Size down for a more fitted look.
How to Measure
Chest
Measure around the fullest part of your chest, keeping the tape horizontal.
Waist
Measure around your natural waistline, keeping the tape comfortably loose.
Hips
Stand with feet together and measure around the fullest part of your hips.