Ralph Lauren Girls' Size Chart
Complete girls' sizing guide for Ralph Lauren with measurements, fit tips, and conversions
Use this girls size chart to compare your measurements against Ralph Lauren's official sizing. Each table shows body measurements and international conversions.
Fit Notes
Ralph Lauren polos are the reference point most other polos are measured against — Classic Fit is generously cut through the chest and body with room to spare, Custom Slim Fit is trimmer but still not tight, and the newer Slim Fit is genuinely close to the body. Oxford shirts run long in the sleeve by US standards, and the collar sits a half-size larger than the marked neck once the placket relaxes with washing. Chinos and shorts are cut with a higher rise than most contemporary brands, and the RLX and Purple Label lines use their own drafts that don't cross-reference to the mainline Polo chart. Women's Ralph Lauren dresses run a size smaller than the Lauren by Ralph Lauren diffusion line.
Common Sizing Mistakes
The recurring mistake is buying a Classic Fit polo in the buyer's usual size and finding it billowy — a Custom Slim in the same numeric size is what most modern shoppers actually want. On dress shirts, buyers frequently pick a neck size but ignore the sleeve length; Ralph Lauren's sleeves run about half an inch longer than the equivalent Brooks Brothers shirt at the same neck size. A third pitfall is cross-shopping Polo, Lauren, and RLX as if they share a chart — they don't, and the same numeric size can drift by a full step across the three lines.
How Ralph Lauren Compares
Against Brooks Brothers, Ralph Lauren shirts are cut a touch trimmer through the waist but longer in the sleeve, which is why buyers migrating from Brooks often need a shorter sleeve than they're used to. Against Tommy Hilfiger, Ralph Lauren's Classic Fit is nearly identical in the chest but has a more traditional, higher armhole. Against Vineyard Vines, Ralph Lauren polos are a hair longer in the body and comparable in the chest.
Size data referenced from Ralph Lauren's size guide, last verified July 2026.
Last updated: Q3 2026 · Reviewed quarterly by JC, SizeHub editor
Kids' Sizing
Clothing — Babies & Toddlers (0–3 Years)
| Size | NB | 3M | 6M | 9M | 12M | 18M | 24M |
|---|---|---|---|---|---|---|---|
| Height | up to 21" | 21–24" | 24.5–27" | 27.5–29" | 29.5–31" | 31.5–33" | 33.5–35.5" |
| Weight | up to 10 lb | 10–14 lb | 14.5–18.5 lb | 19–22 lb | 22.5–25 lb | 25.5–27.5 lb | 28–30 lb |
| Waist | 16.5" | 17" | 17.5" | 18" | 18.5" | 19" | 19.5" |
Clothing — Children (4–7 Years)
| Size | 2T | 3T | 4T | 5 | 6 | 7 |
|---|---|---|---|---|---|---|
| Height (in) | 34.5–36.5" | 37–39.5" | 40–42.5" | 43–45.5" | 46–48.5" | 49–53" |
Clothing — Youth & Teens (8–16 Years)
| Size | S (8) | M (10) | M (12) | L (14) | L (16) | XL (18) | XL (20) |
|---|---|---|---|---|---|---|---|
| Height (in) | 53.5–54.5" | 55–56" | 56.5–58.5" | 59–61" | 61.5–63.5" | 65–66" | 66.5–68.5" |
Shoes — Babies & Toddlers (0–3 Years)
| Size | 0 | 1 | 2 | 3 | 4 |
|---|---|---|---|---|---|
| Length (cm) | 9.5 | 10.5 | 11 | 12 | 13 |
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Frequently Asked Questions
Does Ralph Lauren run true to size?
Polo Ralph Lauren runs true to size with a comfortable fit. Purple Label runs slimmer and more tapered. We recommend checking the specific label's size chart.
What's the difference between Ralph Lauren labels?
Polo Ralph Lauren is the most common with a comfortable fit. Purple Label is slimmer and more luxurious. Lauren (women's) offers a true-to-size comfortable fit.
How do Ralph Lauren kids sizes work?
Kids sizes are based on age and height. Baby covers Newborn to 24 months, Children 2–7 years, and Youth 8–20 years.
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.