It is crucial to measure the size of the sink bowl prior to placing your order. Taking the measurement is quite easy and here is the process: - Start with the length of the sink by measuring the inside of the bowl about 1 inch from the bottom of the sink. Do not measure the top inside as this will result in wrong measurements. - Deduct ½ inch from the length. This is meant to leave some space to allow you to place the sink grid with ease inside the bowl. - Take the width of the sink by measuring 1 inch from the bottom of the sink. - Again, reduce ½ inch from the width to make it easy to insert the grid. - Finally, consider the drain hole in your sink to ensure that the location matches the one on the sink grid you choose.