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Kids' Under Armour Clothing Size Chart

  US Sizes Chest (in) Waist (in) Height (in)
XS 7 25-26 22-23 48-50
SM 8 26-28 23-24 50-54
MD 10-12 28-30 25-26 54-59
LG 14-16 30-32 26-27 59-63
XL 18-20 32-34 28-29 63-67

Chest: Place the tape measure under your arms at the fullest part of your chest, wrap around your body until your fingers meet and mark the measurement.
Waist: Measure around your natural waistline - right above your hips. Be careful not to squeeze too tight to allow a little give.