I didn't know the size of the Large Silicone Sink Mat when I ordered it, but this is easy to cut down if needed. It is 16.25 inches by 12.75 inches. I like that there are marks for cutting out the drain hole so I can customize it to what my sink needs. This is only a little too big for my sink so I trimmed the edges down as well and it fits perfectly now. I really like that it has little feet on the bottom to help aerate and keep things cleared away. The silicone is thick and well made. I expect this to last awhile.