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 is. 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 pull out and solve. Here are the exact sizes of the 20 puzzles: 10 nonograms measuring 80 x 50 fields; 1 nonogram measuring 75 x 50; 2 nonograms measuring 70 x 60; 4 nonograms measuring 85 x 50; 3 nonograms measuring 100 x 70. English instructions included.