SUPER JUNIOR Siwon Blue Ring name (heart-shaped plastic cased) Super Junior ring (japan import) Name of siwon junior entered in korean and english, is a ring of sj color blue. Material: titanium, stainless steel, silver plated blue plating. Logo: super junior siwon korean name. I'm getting double ring ring of stainless steel blue are overlapped on top of the silver ring made of titanium. About 17mm inner diameter ring: size. (the tag that is attached to the ring and the term "size17" is the 17mm. ) [attention] ring inside diameter is in accordance with the notation of the manufacturer. I proposed that by the condition of the finish one by one, and whether there is the case that an error occurs in the inner diameter. Ring size, so will continue to change in 0. 4 mm units, please refrain looking for a good size. Please order only person who understands tastes as goods only.