Black wrist stap for your phone, keys, usb, camera, ID tag or more. 
I use different colour ones for my phone and keys to help me grab the right one quickly. 
I love them and wouldn't go without now. 
 
At the moment I have these in Leopard, Black and white snow leopard, Plain black, Cactus and Yellow blosssom. 
 
Actual strap is 16cm length by 2cm width. (Plus the hardware).