oh oh ive made one of those kinda hat b4 its actually realli easy,
make like a U pattern , then cut out 2 of them for the actuall hat part sew those 2 pieces together, the cut out 2 smaller U's for the ears and sew them on where ur ears should go i suggest a stretchy kinda material as ur head may not fit exactly, iono but since im not usuing and reference it should look like this u^u, hope that helps prolly not tho^^~!