Nonogram is the picture puzzle that stands out. The numbers next to the grid indicate which areas need to be colored in. The larger the puzzle, the more challenging it becomes. Here we offer 20 mega nonograms in oversized A3 format! These templates are designed for nonogram fans who love a challenge. The 20 puzzles are packaged as loose double pages in an A4 folder, making them convenient to remove and solve. Here are the exact sizes of the 20 puzzles: 10 nonograms 80 x 50 squares; 1 nonogram 75 x 50; 2 nonograms 70 x 60; 4 nonograms 85 x 50; 3 nonograms 100 x 70. English instructions enclosed.