I have always heard when using a bench ottoman with a sofa take 1/2 the length of the sofa so it the sofa is 88" the ottoman would be 44" long. In your case you have two perpendicular sofas. If you were to follow this reasoning and you wanted one square ottoman the ottoman should be 44" by 44". I have also heard that many architects and designer employer the "Golden Ratio" to determine the most pleasing size for a rectangle. But quite frankly I am not sure how you would calculate this in your case. Perhaps other readers could answer this question. You could look on Goggle for information about the "Golden Ratio". What you might want to do is layout various rectangles on the floor and see which one looks best. You could even make a cardboard template. Keep in mind if you have leather sofas and want a leather ottoman, that a hide of leather is only so large and you may have to have one or two seams in the top. For example it would be nearly impossible to find a clean leather hide that is 56" square and even 52" square, if you wanted a top without a seam. You might find one that is 44" square. Another good option for a large cocktail ottoman would be a tufted ottoman, these are commonly available. After you purchase the ottoman you might even look for a removable tray for the top.

Someone beat you to it, but I would not think it would be a practical coffee/ottoman table. It did not look like it was on feet and the "toe bump" issue can be a problem making a coffee/ottoman table without feet very annoying.

Thanks, Les. This is a room that we will spend time in, so we will be watching TV and putting our feet up. I am planning to put a rug in there, and maybe rather than a coffee table ottoman, a coffee table would be better. We can always get a small ottoman to pull over from a side chair maybe if we want one. As far as pattern and color goes in the rug, I don't know how much more pattern I can go with since I already have the pattern in the pillows and am thinking of bringing in a side chair in the animal print. However, I may not use the animal print for anything more than a pillow. I don't know yet. I really need some help on finding a side chair for this room too, as well as tables but I guess that's too many questions for this one thread. Johnatemp, if I'm going to go with a coffee table, I think the one you chose is a nice one. I like the color of the wood with the artwork and the sofa I think. And it's not too contemporary looking.

Excellent job! Very creative way to transform an old coffee table. The fabric goes well with the other things in your room. Thank you for photos and descriptions of how you did this. I have upholstered in the past, but never tufted. I may try it someday. Singer Upholstery Basics is one of the books I used to learn from. It's good to know they have a new version of that old book, now. Thank you for sharing your diy experience. Do you have any more upholstery projects in the future?