A furling headsail has a luff tape, a roped edge that slides up the groove in your furler’s foil.
FX Sails’ 2022 build record for a Macgregor 25 headsail: #6 luff tape.
#6 is the most common size. Sailrite’s tape chart lists #6 for Harken 0, 1, 2, 2.5 and 3; Furlex 61A–65A and 60B–66B; Schaefer 2000 and 3000; Profurl 31, 32, 35 and 42; CDI FF1, 2, 4, 6, 7 and 9; and most Hood Seafurl units. Some other furlers use a different size, so we confirm yours.
Pick your furler make in the options above and add the model number (or the tape size, if you know it) in the comments box at checkout. Don’t know your furler? Choose “Not sure - we’ll confirm before cutting” and we’ll confirm the fit with you before your sail is cut.