Size 100 in children’s clothes usually means it’s made for a child around 100 cm tall, roughly 3–4 years old, but it can vary slightly by brand and country.

Quick Scoop: What is size 100 in children's clothes?

  • Height basis: Size 100 is a height-based size used a lot in Asian and some international brands; the “100” refers to about 100 cm in height.
  • Approximate age: Typically fits kids around 3–4 years old (often labeled 3–4Y in Chinese/Japanese/other Asian size charts).
  • Common measurements:
    • Height: about 98–104 cm.
* Weight: around 15–18 kg (roughly 33–39 lbs, depending on chart).

* Chest: about 54–56 cm.

How it converts to other systems

Here’s a simple view of how “size 100” typically lines up with other labels:

Label / Region Approx. Tag Typical Height Approx. Age
Asian / CN size 100 / 100/56 98–104 cm 3–4 years
US kids (many brands) 4 or 4T equivalent About 100 cm 3–4 years
Height-based EU style 100–104 ≈ 99–104 cm About 4 years

One small caution

Different brands cut clothing differently, so two items both labeled “100” might not fit exactly the same. For the best fit, measure your child’s height and chest and compare with that brand’s own size chart whenever possible.

TL;DR: Size 100 in children’s clothes is a height-based size for kids around 100 cm tall, usually 3–4 years old, roughly similar to a US 4T in many brands.

Information gathered from public forums or data available on the internet and portrayed here.