Tabra ankle, wrist and neck connector chains are fastened together by Tabra charms. The Tabra charms are interchangeable between chains. When measuring for the chain, the size of the desired charm needs to be subtracted from the ankle/wrist/neck measurement to give you the correct chain size. The Tabra charms vary in size from 1/2 inch wide to 2 inches wide, so calculating the size of the charm when deciding on which length of chain is very important. Also, if you prefer to wear your chain a little looser or tighter, you will need to factor this in. If you have any questions about sizing, please contact us.