Stainless steel charm: 0.67"(17mm); 8mm Howlite & Matte Onyx Stone , Adjustable Nylon String: Female 6.5"(16.5cm) & Male 7"(18cm) are the shortest length , These couples bracelets deliver a clear message that "My Sun and Stars & Moon of My Life" , These yin yang stone couple bracelets set can be shared between a couple, friends, family members, siblings, or anyone else that is special to you , Come with GIFT BOX; 180 days warranty & free replacement