The Hope set includes five hair tie bracelets in comforting pinks. The silver heart charm has a breast cancer ribbon to show our support to the cause. A portion of the proceeds will be donated to the Susan G. Komen foundation. Small is better for younger girls and small teens. It fits wrists under 5" around. Medium is the size of a normal hair tie band. It fits wrists between 5-6.4" around. Large is sized for wrists 6.5-7.5"