There are so many wonderful DIY ideas that work best if you use a cutting mat.

Kelly tapes the grid side, I would tape the solid side, but thats just me.

This is a fantastic idea sn is useful.

How To Make A Large Cutting Mat From Smaller Cutting Mats

Image By: Kelly Barlow Creations Via YouTube

Tape Small Cutting Mats Together Using Duct Tape To Make a Large Cutting Mat

How To Make a Cheap Easy Cutting Mat