Under Armour Kids Clothing Size Guide

Under Armour Kids Clothing Size Guide
  XXS XS Small Medium Large XL XXL 3XL
Age (years) 5-6 6-7 7-8 9-10 11-12 13-14 15-16 17-18
Chest (inches)   25-26 26-28 28-30 30-32 32-34 34-36 36-38
Chest (cm)   63.5-66 66-71.1 71.1-76.2 76.2-81.3 81.3-86.4 86.4-91.4 91.4-96.5
Waist (inches)   22-23 23-24 25-26 26-27 28-29 30-31 32-33
Waist (cm)   55.6-58.4 58.4-60 63.5-66 66-68.6 71.1-73.7 76.2-78.7 81.2-83.8
US 6 7 8 10-12 14 16 18 20
Under Armour Kids Socks Size Guide
  Medium Large XL
Size UK (Youth) 10K-13K 13.5K-3.5  
Under Armour Kids Caps / Visors Size Guide
  XS/S S/M OSFA (One Size)
Head Circumference (inches) 20.25-21 21-21.5 21-22.5
Head Circumference (cm) 51.5-53.5 53.5-54.5 53-57