Base: 4 1/2" or 114 mm. Height: 4 3/4" or 117 mm. Ideal Weight: 140+ lbs or 63+ kgs. Designed by Casey McCrystal. A full depth fin at 4.75 with a standard 4.5 base dimension. A great fin for bigger guys that like to get tubed. The Full depth and raked tip help hold you in steep hollow faces. The 4.5 base will allow quick direction changes under the lip.This fin is a proven performer that is powerful in turns and good for snappy directional changes.