Size is approx. 8.3 by 5.1 by 1cmInsert your finger through the ring to easily support holding your smartphone.Since you can attach the carabiner to items like your bag’s strap, it’s convenient for carrying or attaching straps.- It is recommended to use a smartphone case with a charging cable port width of 10-15mm.- Even if the dimensions are recommended, depending on the combination of smartphone and case, and the case material, it may come off easily.- After attaching this product, pull the carabiner to ensure it does not come off easily before use.