Size Guide

Costumes are sized by age, but every kid is different — so use your child's height as the real guide. When they're between sizes, size up.

Kids size chart

Size	Age	Height	Chest
2–3Y	2–3 years	92–98 cm / 36–39"	53 cm / 21"
3–4Y	3–4 years	98–104 cm / 39–41"	55 cm / 22"
5–6Y	5–6 years	110–116 cm / 43–46"	59 cm / 23"
7–8Y	7–8 years	122–128 cm / 48–50"	63 cm / 25"
9–10Y	9–10 years	134–140 cm / 53–55"	67 cm / 26"
11–12Y	11–12 years	146–152 cm / 57–60"	72 cm / 28"

How to measure

• Height: stand your child against a wall, no shoes, and measure from the floor to the top of the head.
• Chest: measure around the fullest part of the chest, keeping the tape level and snug (not tight).

Match the height first — it's the most reliable. If the height and age don't land on the same size, go by height.

Fit tips

• Between sizes? Size up. Kids grow fast, and a little extra room lets them wear a warm layer underneath for a cold October night.
• Onesies and plush costumes (dinosaur, unicorn, dragon, lion, werewolf) run roomy — true to age is usually perfect.
• Gowns and capes have length to them — the height column is your best guide.
• Every product's "Size & fit" notes flag anything that runs small or large.

Still not sure?

Email support@goscary.com with your child's height and the costume you're eyeing — we'll tell you the best size.