Too big at 100 kg.. You must be kidding..
Maybe too heavy for some 12'6" boards (like the 24" wide LE) but not for one like mine.
My 12'6" Glide would float an elephant ..

I'm 95kgs and I barly sink it half an inch into the water and the big boxy rails seem about 8" thick and it's about 30" wide.
DJ