Size is approx. 10 by 10 by 10cmAdditional product info:Acrylic Charm Shoulder Strap! The color matches the image of Pokemon.[Compatible Smartphone Case Shapes] Usable: The bottom center has an opening of 12mm or more Not Usable: The entire bottom is open [Installation Method] 1. Set the strap sheet in the smartphone case and let the flap of the sheet out of the case. 2. Attach the smartphone to the case. 3. Attach a carabiner to the bottom of the sheet.