The puzzle framing kit includes all you need to frame your finished puzzle. It includes a high quality frame along with foam core backing, puzzle glue, spreader and instructions. Puzzle framing kits can take up to 1 week to be shipped. The 16" x 20" fits most Dowdle 100 and 500 piece puzzles. The 19.25" x 26.625" fits most Dowdle 1000 piece puzzles and 500 piece "Best of" series of puzzles. Please refer to your puzzle box for size information in order to determine which puzzle frame is right for you. Works for both horizontal and vertical images.