JP-AUSTRALIA - Board/Fin Combination Chart 2015 Slot Box Size QUAD FIN USE Board Size Length Area (cm2) Recomm. Sails RADICAL QUAD use with side fins Board Size Area (cm2)Recomm. Sails use with side fins 47 52 This fin comes with the board Boards come 2x with this fin size and 2 Side Fins (Quad set-up) + 2 covers for the Mini Tuttle Box For Twinser-use in the same range use 2cm bigger fins (table on the right). THRUSTER QUAD use with side fins 47 52 The center fin in this size comes with the board including 2 Side Fins (Thruster set-up) PowerBox Size Board Size Length Area (cm2) Recomm. Sails MAGIC RIDE SUPER SPORT X-CITE RIDE use with side fins This fin comes with the board Board Tuttle Box Size Size Length Area (cm2) Recomm. Sails Board SLALOM Size 60 Area (cm2)Recomm. Sails 6.4-7.8 SUPER LIGHTWIND (Carbon) 56 (DTB) 60 (DTB) This fin comes with the board