Are 2 large panes of commercial grade Thermopane glass, each measuring about 55 x 60 inches and 1 inch thick.
The actual glass panes are about 3/16" thick laminated into a pane the overall is just about 1" thick. They are tinted a blue-green color, and would work as make-do picture windows to the right person.
I got these off of salvage and really don't need anything out of them. They are difficult to move. Gloves are required. They most likely are tempered glass due to them coming from a commercial building, but are still somewhat fragile (you don't want anything dinging the edge or they could shatter). I'd guess they weigh 60 to 80 pounds each.
I can get you exact measurements if needed. I'm not about to quibble about price. I feel this is a pretty good value as priced