The CutterPillar Tempered Glass Cutting Mat is 20 times harder than regular glass, making it ideal for crafters, artists, designers, and photographers. You can cut, paint, stamp, or glue on it since it's virtually stain-proof! It's the perfect companion for the CutterPillar Glow when you need a harder surface than the standard self-healing mat! Anything that sticks can be washed or razored off without worrying about scratching the surface. It is also resistant to heat so you can iron on it too! This safety glass won't break into shards like regular glass would. This mat has angle lines, along with a 1/2 and 1/4-inch grid system that can be used for sewing and quilting. Along the bottom are soft rubber feet that will keep the mat stable on any surface. Cutterpillar Tempered Glass Cutting Mat measures approximately 12" by 16.5".