Our Celebrate set includes five bracelets that double as hair ties in colors inspired by the beach - ocean blues and coral hues. The silver wave charm is the best symbol to help us celebrate our everyday swells. 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" Please allow 5-8 business days for shipping.