2mm Thin Fly Foam is the standard size foam to tie all sorts of foam dries and terrestrials. Great for tying hoppers, crickets, ants, stoneflies, cicadas, beetles, caddis, and anything else you can imagine. 2mm Thin Fly Foam can also be folded, stacked, cut to shape, and glued to make all sorts of crazy creations such as poppers, frogs, gurglers, and mice! Adds great floatability to your patterns 2 sheets that measure 4.5" x 3"