Size is approx; 10 by 10 by 10cmAdditional product info; Acrylic Charm Shoulder Strap! It comes in colors matched to the image of Pokmon.Compatible Smartphone Case Shapes:- Usable: The bottom center is open by 12mm or more- Not Usable: The entire bottom is openHow to Attach:1. Set the strap sheet in the smartphone case, and let the sheet tab stick out from the case.2. Attach your smartphone to the case.3. Attach the carabiner to the bottom of the sheet.