Extra-small areas

Men: ears
Women: feet and toes

Small areas

Men: nape of neck or upper lip
Women: breasts, chin, nape of neck, or upper lip

Medium areas

Women: partial bikini, side of face, underarms, or partial abdomen

Large areas

Men: full shoulders, upper arms, forearms, or full abdomen
Women: lower back, chin and neck, chin and upper lip, full abdomen, forearms, or full bikini (not Brazilian)

Extra-large areas

Men: full back, chest, or chest and abdomen
Women: full arms, lower legs and knees, or thighs and partial bikini