The Channel Islands TPH Hand Foiled Single Fin. Built to complement our Tri Plane Hull Single midlength, Devon worked on this sleek single-fin that is available in three sizes: 8, 8.5 and 9. The CI Single Fin template is rather upright, which helps the board pivot and turn on dimewhile its slender outline and conservative rake profile provide a nice flow on down the line point breaks. Our general sizing guideline goes as follows: 8 for 67 & under; 8.5 for 68 to 75; 9 76 & over. The CI Single-Fin is also an ideal pairing for those looking to ride their CI Mid as a single-fin. This fin can also be used with our CI Mid sidebites for longer boards in the 9-foot-plus range.