Prepare materials: corrugated paper, scissors, ruler, crimping tool, etc.
Cut a rectangle 28.5 cm long by 21.5 cm wide, and leave 2 sides 5 cm wide on each side.
Cut 2 rectangles 27.6 cm long by 8 cm wide; 3 rectangles 20 cm long by 8 cm wide, respectively. Fold the width in half and cut the concave edge for fixing after dividing the length in thirds.
Fold them together and a durable and simple homemade lattice organizer is ready.