Youth size charts give clothing and shoe sizes for toddlers, boys ages 8 to 16 and girls ages 7 to 14. Similar to adult size charts, youth sizes are determined by physical measurements.
The toddler and younger kid size charts use height and weight ranges to determine clothing size. Sizes that end with the letter "T," as in 2T and 3T, are meant for toddlers. Young children sizes top out at a height of 51 inches and weight of 58 pounds. After age 8 in boys and 7 in girls, youth size charts separate by gender. On these charts sizes are determined by height and the bust or chest, waist and hip measurements.