It is an odd size. I was playing with a strip tube block in my eq and my teenage son started flipping the blocks around. He liked his design and I figured it was a fun way to make one for him. It is 77 x97 with the boarder. I had purchased a queensized bat for another project but thought it would be an easy way to help stabillize the blocks. If it turns out too lumpy with all of this stretching I suppose the dog will enjoy it.