Toddlers & Kids Underwear and Tights
Size
(approx)
Alpha Height in Inches Weight in lbs Age Waist in Inches
2T/3T   31-38" 26-34 lbs 1-3 yrs 20-20½"
4T/5T   38-45" 33-53 lbs 3-5 yrs 21-21½"
2-3 XXS 31-38" 26-34 lbs 1-3 yrs 20-20½"
4-5 XS/S 38-45" 33-53 lbs 3-5 yrs 21-21½"
6-8 S/M 45-54" 43-67 lbs 5-8 yrs 22-23½"
10-12 L 54-60" 67-85 lbs 8-10 yrs 24-25"

How to Measure Kid and Toddler Sizes:

Measuring Guidelines for Kids and Toddlers Height Stand child with feet slightly apart and their back to a wall. Measure from the floor to the top of their head for height. Measure child without shoes for best results.
Waist Standing straight up, measure child's natural waist. Keep tape measure comfortably loose and parallel to the floor.