“I bought two of these bands. I printed off the guide which told me to order size small. I was a bit wary but trusted their instruction since I was right in the middle of the small size on the guide. When I first got them I was worried they were too small but as recommended to go small because they will stretch out some, this rang true. I have only worn one so far to see the difference in sizing. After about 1-2 weeks or normal wear the one band I have worn has stretch some. Nothing crazy and still fits very snug. If anything I would say they ship small and stretch out to the appropriate size so if they seem small initially give them a bit of time.”