The Gladiator Matrix Wakeboard has all the features you need for fun on the water. The sweet continuous rocker and center fin provide a stable platform for learning new moves. Molded side fins and huge double-barrel channels let the Matrix Wakeboard track on edge and explode off the wake. A great board for those just starting out in wakeboarding. 1.8″ plastic fin. Matrix 135: 53.1″L x 16.8″W For 100-180 lbs. riders. Matrix 140: 55.1″L x 16.9″WFor 140-230 lb. riders.