Do windows (double glazing) come in standard sizing? If so what are these standard sizes?
Answers:
Each manufacturer has its own standards. There are many manaufacturers and many standard sizes in each.
Other answers:
3 feet wide by 5 feet tall is the most standard window size.
3 feet wide by 5 feet tall is the most standard window size.
You can buy windows any size you want depending on how much you want to pay. The best response to the question is that most windows will be sized down to the half foor. So it would be:
3 x 5
4 x 6
4.5 x 6
4 x 6.5
3 x 7
3.5 x 7