We also love our Wellness Mat--more comfortable and easier to clean than a rug.

I bought one of those soft wellness mats from frontgate, and it is perfect for standing while I wash dishes. You can also easily wipe it down.

Get a cheap indoor/outdoor rug or one of those cushioned rugs. Costco had these a few days ago.

What kind of rug/mat lasts well (doesn't get worn out) in front of a kitchen sink?