Size is approx. 10 by 10 by 10cmAdditional product info:Acrylic Charm Shoulder Strap!Comes in colors that match the Pokemon image.Compatible Smartphone Case Types:- Usable: Central bottom opening of 12mm or more- Not Usable: All Open at the BottomHow to Attach:1. Set the strap sheet into the smartphone case, making sure the flap of the sheet sticks out from the case.2. Install the smartphone into the case.3. Attach the carabiner to the bottom of the sheet.