This narrow 5 inch by 5 foot space between the lower and higher levels of my kitchen work island bothered me, I found it unsightly. I've been wanting to tile it for a while but I'd never done it before, and by the time I decided to give it a shot, the tile around the rest of my kitchen had been discontinued. You can see a tiny bit of it on the far right behind that coffee cup. I found this ceramic and glass tile mosaic which coordinated with it though and went for it, using those tile setting sheets and then grout. They're great for smaller jobs like this, no waiting for mortar to set and cure so you can do the job in one day! Cuts down on the mess too. I had a little tile leftover so I also made a couple of trivets. Tfl.