Majestic boy’s size chart: http://www.majesticathletic.com/boys.htm

Majestic men’s size chart: http://www.majesticathletic.com/men.htm

Majestic Boys Size Chart

Small (8) Medium (10/12) Large (14/16) Extra Large (18/20)
Height (in) 48-54" 54-60" 60-66" 66-69"
Weight (lb) 57-66" 67-74" 74-84" 85-115"
Chest (in) 26-27" 28-29.5" 31-32.5" 34-35.5"
Waist (in) 22.5-23.5" 24.5-25.5" 26.5-28.5" 29.5-31.5"
Hip (in) 26-27" 28-30" 31-33" 34-36"

Majestic Mens Size Chart

Small Medium Large Extra Large 2XL
Chest (in) 34-36'' 38-40'' 42-44'' 46-48'' 50-52''
Waist (in) 28-30'' 32-34'' 36-38'' 40-42'' 44-46''
Hip (in) 34-36'' 38-40'' 42-44'' 46-48'' 50-52''

This chart describes measurements of a man's body 5'8" to 6' tall.  Body Length - Start measurement from the center back of neck.  Chest Width - Measures directly across underarm to underarm, front side only.