Kitchen Sink Grids 18X13 Center Drain Left To Right 18.07" x Front To Back 12.56" With Corner 1.5-in SWL-C1812Please measure the sink bottom (about 1" up from the bottom) from left to right, front to back, the drain hole location, and the corner radius. The grid dimensions should be 1 2 inch to 1 inch smaller than the sink bottom for the best fit. Grid dimensions: Left to Right 18. 07" Inch X Front to Back 12. 56" Inch to fit your sink bottom with a 1. 5 in corner radius, with the drain situated at the Center Drain. The kitchen sink protector is constructed