General size (adult): 8 "(L) x 1/2" (W) x 1/16"(H) or (202MM x 12MM x 2MM) Women"s size (adult): 7.5 "(L) x 1/2" (W) x 1/16"(H) or 190 MM x 12MM x 2MM) General size (children): 7 "(L) x 1/2" (W) x 1/16"(H) or (180MM x 12MM x 2MM) 61/2 "(L) x 1/2" (W) x 1/16"(H) or (165MM x 12MM x 2MM) The maximum screen printed and engraving area for adults is 7.677"X 0.334" The maximum area ocarabiner keychainf screen printing and engraving for children is 7.00"X 0.334" As for width, commonly used are: 1/4 "or 6MM 1/2 "or 12MM 3/5 "or 15MM 3/4 "or 19MM 1 "or 25MM bracelet-silicone-personnalise-montrealembossed-wristbands e wristbands and keychains are same design of the one you order. Medical bracelet is one of our useful product. Medical bracelets is commonly used. It is a high quality silicone bracelets with the ID printed on. We can print bar code, QR code or unique serial number together with some detail of the medical institute. Usually the bracelet width need at least 15mm so that the code is clear enough to be scaned. We you scan the code with a phone, the detail of patient name, disease, taboo drugs, status will show up. It is a good help for doctor and patient to know the trcarabiner keychaineatment. It will be good help for hospital to manage patients. All the medical bracelets should made from 100% silicone which is harmless and eco friendly to avoid secondary injury to patients. If the medical id bracelet is embeded with a chip, it will note down the information of exercise, heart beat and sleeping. Then trafer it to the phone app. It contribute to health care.