The Pencil Collage Jigsaw Puzzle by White Mountain Puzzles is very colorful and challenging. This collection of pencils was created by artist Maureen Rupprecht. The unique interlocking pieces are made of sturdy blue chipboard on recycled paper. This 1000 piece puzzles finished size is 24 x 30 inches. If you’re looking for large and difficult jigsaw puzzles, this is one of the best for you.