Norpro Flexible Gripping Cutting Mats, Set of 4 Measures: 15" x 11" / 38cm x 28cm 4 piece set includes red, orange, lime green and blue. Avoid cross contamination by using different color for each food group. Use with grid side down on flat surface or counter top - protects your counter top. Non porous, won't retain odors or dull knives. Great for home, camping and your RV. FDA approved. Dishwasher safe.