FreakoutNation with this Excite Plug Made from medical grade stainless steel this is a perfect Sperm stopper penis plug.approximate measurements MEDIUM Overall length: 75mmInsertable length: 20mm Ball: 8mm Plug width: 2mm Internal ring sizes (small - large): 25mm - 28mm LARGE Overall length: 68mmInsertable length: 20mm Ball: 8mm Plug width: 2mm Internal ring sizes (small - large): 30mm - 32mm