Ringside Super Swivel mount Medium are 4 3/4" outside

Medium are 4 3/4" outside and 3 1/2" inside

To determine correct size

Stainless steel metal chain links attacthed to ball-bearing swivel joints ensure smooth rotations between 3 padded sections

Large = 16 oz

then you'll love this 12 oz

Ringside Super Swivel mount Medium are 4 3/4" outsideThe Ringside Super Swivel features faster rebounds and bag speed that makes athletes react more quickly and helps develop increased hand speed. High tech one piece design assures smooth and efficient action every time. Reinforced swivel rotates 360 degrees and is crafted for speed, rapid strikes, true rebounds and efficiency. Ball bearing mechanism is precision crafted to provide resistance free motion Stainless steel will never rust or chip like