Hi Scotty
Unfortunately this cushion bag will not fit the seat cushions. One bag should be sufficient enough for the back cushions and the throw pillows. I hope this helps.

The Veranda Patio Cushion Bag is water resistant but is not considered waterproof. This item will block the rain but it is not recommended to leave it outside in the weather for long periods of time. It is very difficult to stop all moisture on any product that has a zipper. If you have to leave the bag outside, it is recommended to place it in an area that has some protection (like the overhang of a roof) and try to keep it out of an area that would have standing puddles for long periods of time. I hope this answer helps.

Hi LauraJ,
Unfortunately this cushion bag will not work unless you want to use it for only the cushions. I would recommend using the patio table and chair set cover (the only problem is in the height, there isn't one that we carry that is tall enough). I have worked it out and with the dimensions of the cover you should only need one. To see this cover please visit http://www.homedepot.ca/webapp/wcs/.... I hope this helps.