It's the wonderful New York Beauty, my fav pattern. It is a lot of fun.The arc with spikes in it is the only pp part, lf you make a pattern you have to add 1/4 in seam allowances to the large on the concave side, 1/4 to both arcs on the middle piece and a 1/4 seam allowance to the convex lower arc. Then they will fit together easily.