This is great! Our sofa is 84”  I ordered the XL  it’s perfect. The arm protectors with the pockets will hopefully prevent my husband from constantly losing or sitting on the remotes! And the cover will protect our sofa from greasy little hands (husband!). And I don’t have a worry. Drool away  munch your munchies! The fabric BTW feels like nice percale sheets. Navy on one side, cream on the other. The cream side does not have pockets in the arm covers. Not an issue for me but just so you know. Price is great  delivery wicked fast. The photo includes my dog! You’ll notice the arm covers are not “caps”- I’m awaiting our arm caps for this new sofa. I’m the meantime a towel works-you can see the Wayfair arm coverage on one arm better.
The back strap is simple to attach to the cover loops  wrap around the sofa-ours has very full back pillows  it fits fine. Enjoy this cover. Next step painting the walls!