VENTURE out of your comfort zone. K'lani hair tie bracelets can be used as a bracelet or hair band. 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 3-5 business days for shipping. Large is sized for wrists 6.5-7.5"