The Ja Mako shares some characteristics of the "Piranha" but for heavier riders. Many heavier riders love the "Piranha", but of course they have to work a little harder or own boats that produce wakes on the large end of the scale. The "Ja Mako" is also great for smaller beginners or families who want to own a Stix that will be suitable for many size riders. We are always happy to answer any questions by phone or email to help you decide which "STIX" is correct for you. This is the reason we have not had an unhappy customer in 7 years. "Shred Stixx, The Original WakeSurfing Company" length- 4'11" width- 20.5" thickness-2-1/16". (MUST SHIP UPS ONLY)