Studs are small charms that simply pop into the holes of your smartwatch bands for a snug fit.   

classic and infinity bands from Fitbit

• Our Fitbit studs are designed for Classic and Infinity bands from Fitbit. These bands have rectangular holes; the back of our Fitbit studs is rectangular. 

other bands with rectangular holes

• studs may fit third party silicone bands with rectangular holes that have similar dimensions (approximately XX mm)
• we are not able to guarantee fit or warranty studs on third party bands
• if you have questions about compatibility, please email us at support@bytten.com