Size is approx: 13.0 by 5.5 by 1cmAdditional product info: The ring supports holding your smartphone more easily by passing your finger through it. The carabiner can be attached to bags or handles, making it convenient for carrying! It can also be used for attaching straps. We recommend using a smartphone case with a charging cable port width of 10 to 15 mm. Even with the recommended dimensions, certain combinations of smartphones and cases, or the material of the case, may lead to it coming loose easily. After attaching this product, please pull on the carabiner and ensure it does not come out easily before use.