I have 2 rectangle tables creating an "L" shape for my work area. One is covered with a large cutting mat and the other holds a table top ironing board. They both have straight legs but were different heights. To equalize the difference and raise them so I didn't have to bend over too much, my man made wood blocks about 4" square to place under each leg and routed out the centers of each block to fit the legs to prevent them from slipping or getting knocked off. Works perfectly! I think he's a keeper.