The Breathe set includes five bracelets that double as hair ties in colors that will soothe the soul and remind us to just be still. The lotus flower charm and earthy stone beads are beautiful and calming accents for this yoga inspired set. Medium is the size of a normal hair tie band. It fits wrists between 5-6.4" around. Small is better for younger girls and small teens. It fits wrists under 5" around. Large is sized for wrists 6.5-7.5"