Energize your vibe and INSPIRE others with this classy pack! K'lani hair bracelets can be used as a bracelet or hair band. Medium is the size of a normal hair tie band. It fits wrists between 6-6.5" around. Small is better for younger girls and small teens. It fits wrists under 6" around. Large is sized for wrists over 6.5" Please allow 3-5 business days for shipping.