Oval base ring: 1 7/8” left to right Cage: 1 3/8 ID 2.5” length Security screw option w two two keys and two screws. Can also use a lock in place of screws. Has a second hole drilled behind the screw for a security tag, this was an upgrade. Additional options: punishment pin. Small blunt pin included. Additional pins from MM are $10 if you want something longer. Hardly worn. Cleaned thoroughly. USA buyers only. PayPal accepted, will ship USPS Priority immediately after payment. Ordering this from them would be $500+. Selling for $300, free shipping to US only.