Teen Ring Size Guide
Teenage fingers are still growing, so the goal is a ring that fits now and still works in a year or two.
Quick answer
Most 13–14 year olds wear a US 4 (UK H) and most 15–18 year olds a US 4½–6 (UK I–L½). Measure before buying anything expensive.
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Inside circumference, mm
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Inside
Inside
Inside
Matched inside diameter 17.30 mm · circumference 54.35 mm
Conversion table
| Age | US size | UK size | Inside diameter |
|---|---|---|---|
| 0–12 months | 0 | A | 11.6 mm |
| 1–2 years | 1 | B½ | 12.4 mm |
| 3–4 years | 1½ | D | 12.8 mm |
| 5–6 years | 2 | E | 13.2 mm |
| 7–8 years | 2½ | E½ | 13.6 mm |
| 9–10 years | 3 | F | 14.0 mm |
| 11–12 years | 3½ | G | 14.4 mm |
| 13–14 years | 4 | H | 14.8 mm |
| 15–16 years | 4½–5 | I–J½ | 15.2–15.6 mm |
How much sizes change in the teens
Between 13 and 18 many people move up one to two full sizes, and growth is fastest in the year or two around a growth spurt. A ring bought at 14 often needs resizing by 17.
Choosing a ring that lasts
- Prefer plain gold or silver bands — they are the easiest and cheapest to resize.
- Avoid eternity bands and tungsten, which cannot be resized.
- Adjustable rings and open shanks cover two or three sizes.
- Keep the receipt and ask about the shop's resizing policy.
Measuring a teenager's finger
Use the string or paper method at the end of the day, at room temperature, on the finger the ring will be worn on. Take the average of three readings and round up if the knuckle is prominent.
Frequently asked questions
What is the average ring size for a 16 year old?
Around a US 4½ to 5 (UK I to J½) for girls and a US 8 to 9 (UK P½ to R½) for boys, but individual variation is large.
Should I buy a teenager a bigger ring to grow into?
Only by a quarter or half size. Anything larger will slip off and be lost.
Keep reading
For an expensive ring, confirm the size with a jeweller before ordering — see the ring size FAQs for resizing advice.