Paddle Set / Noma 302565 Pack Size:1 NOMA 302565 ROTARY 5533, ROTARY 13169 Square paddles have 3 mount holes , Half round paddles are 11 1/8" OD x 1/4" THK , Square paddles are 1 3/4" W x 3 3/4" L x 1/4" THK , Half round paddles have 6 mount holes