Wonderful,special design,easy to useconvenient and practical Size, Chain length of about 16cm, about 5cm extend chain, A width of about 2.0-3.5cm,Material: pu+alloy ,Notice : ,1:As different computers display colors differently, the color of the actual item may vary slightly from the above images.,2:Attention: please allow 1-2 cm(0.4-0.7in) error of measurement.