What material is the soft ruler made of?

Materials are paper, scissors, stapler, glue or transparent glue.

Manufacturing method of soft ruler:

1. Print the measuring ruler on the printer, and then cut the printed finished product along the dotted line with scissors.

2. Fold back at the seam first, and then fold in half along the crease.

3. Use stapler, transparent glue or glue to bond the folded seam.