The Tim Holtz Media Glass Mat features a 14 x 23 inch smooth black, heat resistant surface with non-slip feet to keep the mat secure when in use on your endless crafting projects. This Glass mat has been designed for left handed crafters.Included is a 12 x 14 inch measuring grid that contains imperial metric measurements and a white 7.5 x 11 inch mixing palette area, perfect when using a variety of mediums.Features Extra Large 14in x 23in Glass Mat 12in x 14in Measuring Grid Area 7.5in x 11in Mixing Palette Area 7.5in x 11in Removable Non-Stick Mat