I have tinted glass deer view windows in two blinds.I really like them. I got the fold up configuration. They tell you to make the window hole one inch smaller than the dimension of the glass window for a good fit. I would actually suggest just a little smaller window opening (about another inch smaller) so the felt lining on the inside of the glass has a good contact with the edges of the window opening. IMO

we make our windows out of wood frame....our blind opennings are usually 6in by whatever length. we take a pieced of 2x8 and cut it down to proper width. bevel the edge. cut out an opening in it which we put tinted plexi glass on. we then hinge that from the inside of the blind so the window folds down to the inside.

its a good tight window, its very quiet, and pretty sneaky to open. windows that open to the outside of the blind are too much motion to move when deer are out there. sliding windows can be noisier. I've had good luck with them though.

these have just been our favorite. they are pretty cheap to make.