http://item.taobao.com/item.htm?spm=a1z10.1.w8470558020.13.8YkEuC&id=20744508035大内径:55mm 宽:20mm 厚:8mm 小内径:49.5mm (此宝贝最适合佩戴是平时带52-54圆镯的MM们)