Size is approx. 15.0 by 10.3 by 1cmAdditional product info: The Multi Holder is a soft silicone bracelet that can also be used as a hand strap. Simply insert it into your smartphone case to attach a strap or hold your smartphone. The carabiner part can be used for various purposes, such as hanging glasses, keys, or masks, and attaching to bags or belt loops.- It is recommended to use a smartphone case with a charging port size of 10-15mm width and a hole type with a thickness of 6.5mm or more. Even with recommended dimensions, it may easily come off depending on the combination of smartphone and case.- Do not wrap the silicone bracelet around your fingers or other body parts. It is dangerous as it may cut off circulation.- If you experience any allergic reactions or abnormalities on your skin, stop using it immediately and consult a doctor.