Size 120 in children’s clothes usually fits a child who is about 115–125 cm tall and roughly 5–6 years old, and it often corresponds to a US size 6/6T (though this can vary by brand).

What “120” Means

  • In many Asian and European brands, “120” is a height-based size, meaning it’s meant for a child around 120 cm tall.
  • Typical height range: about 115–125 cm (around 45–49 inches).
  • Typical age range: about 5–6 years old, but height is a better guide than age.
  • Typical weight range seen for this height: roughly 20–24 kg (about 44–53 lb), depending on brand and build.

Common Equivalents

Here’s a quick look at how size 120 is often labeled in other systems (approximate only, brands differ).

[1] [7][1] [7][1] [1]
System / Region Approx. Label for “120” Notes
US sizing 6 or 6T Often sold as size 6 kids, sometimes 5–6 in generic age labels.
UK sizing 5–6 years Age-based labels like “5–6 yrs” are common.
EU / height labels 116–122 Uses height in cm; ranges like 116–122 cm match size 120.
Metric brands (Japan, China, etc.) 120 Number directly reflects target height in cm.

Think of “120” as “for kids around 120 cm tall,” and then check the brand’s chart to fine‑tune.

How to Make Sure It Fits

  1. Measure your child’s height in centimeters. If they fall roughly between 115 and 125 cm, size 120 is likely the right starting point.
  1. Check the brand’s specific size chart (some run big, some run small, especially designer vs. budget brands).
  1. Consider fit and season:
    • For layering (winter coats, hoodies), you might size up if your child is already near 122–125 cm.
    • For slim builds or fitted styles, staying at 120 instead of sizing up can look neater.

Quick “Real Life” Example

Imagine a 5½‑year‑old who is 118 cm tall and about 21 kg.

  • In a Japanese or Chinese brand: they’ll often wear size 120.
  • In a US brand: you’d likely pick a kids size 6 (sometimes labeled 5–6).

TL;DR: If you’re wondering “what size is 120 in children’s clothes?” it’s roughly for a 5–6‑year‑old who is about 115–125 cm tall, similar to US size 6/6T, but always confirm with the specific brand’s chart for the best fit.

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