Size is approx:10 by 10 by 10cmAdditional product info:Acrylic Charm Shoulder Strap!The strap comes in colors that match the image of Pokemon.[Compatible Smartphone Case Shapes]- Usable: The bottom center is open at least 12mm- Not usable: The entire bottom is open[Installation Method]1. Set the strap sheet in the smartphone case and pull the tab of the sheet out of the case.2. Attach the smartphone to the case.3. Attach the carabiner to the bottom of the sheet.