I ordered 10 of the adult/8" size and 3 child/7" size bands for a diabetic 11-year-old.  He loves them!  He likes the child/7" for the wrist, but for the pool and playground, he prefers the adult/8" around the ankle.  I emailed the vendor, Medical Alert Bands, to specify each band in a different color (from 16 possible color choices!), though I really wish Amazon would simply let me select colors on their ordering page.  These Medical Alert Bands are the BEST.