Kids Clothing Size & Measurement Guide

Kids Clothing Size & Measurement Guide

Find the perfect fit for your child. Use our exact size and measurement breakdown below to choose the right size.

📏 How to Take Measurements

1. Height

Measure from the top of the head straight down to the floor without shoes.

2. Weight

Weigh the child lightly dressed to match our weight ranges accurately.

👕 Kids Size Chart

US Size Age Range Height (in) Weight (lbs) Height (cm) Weight (kg)
2T 2 years 33-36" 29-32 lbs 84-91 cm 13-14.5 kg
3T 3 years 36-39" 32-35 lbs 91-99 cm 14.5-16 kg
4T 4 years 39-42" 35-39 lbs 99-107 cm 16-17.5 kg
5 5 years 42-45" 39-44 lbs 107-114 cm 17.5-20 kg
6 6 years 45-48" 44-50 lbs 114-122 cm 20-22.5 kg
7 7 years 48-50" 50-56 lbs 122-127 cm 22.5-25 kg

Costco US Youth Clothing Size Guide

Refer to the official US sizing metrics below (converted to centimeters) to choose the right fit for kids and teens.

Youth Size US Numeric Size Height Range (cm) Chest Circumference (cm) Waist Circumference (cm)
XS 4 – 6 (or 5/6) 97 – 112 cm 58 – 64 cm 53 – 56 cm
S 6 – 8 (or 7/8) 114 – 132 cm 66 – 69 cm 56 – 58 cm
M 10 – 12 135 – 147 cm 71 – 76 cm 61 – 64 cm
L 14 – 16 150 – 160 cm 79 – 84 cm 66 – 69 cm
XL 18 – 20 163 – 170 cm 86 – 91 cm 71 – 74 cm

* Tip: If your child falls between two sizes, it is usually best to order the larger size for room to grow.

How to Measure (cm):

  • Height: Measure straight from the top of the head down to the floor without shoes.
  • Chest: Measure around the fullest part of the chest, keeping the tape level under the arms.
  • Waist: Measure around the natural waistline (narrowest part of the torso).

💡 Pro Tip: If your child is between sizes or close to the upper weight limit, we recommend sizing up for a more comfortable fit.