I have three of these side tables from IKEA. Great for stacking on top of each other or just putting them together to make a longer coffee table (e.g. for game nights, eating on the floor, etc.). Dimensions: 21 5/8 " x 21 5/8 ". All in this light beige color (IKEA calls it "birch effect").

Here's a link to product online: http://www.ikea.com/us/en/catalog/products/40104270/

I am selling them for $5/each! Please take all three though for $15!