- type of joinery – aluminum, PVC joinery, wooden joinery (as these three basic types incorporate many subtypes with various specifications, and respectively, different prices)
- specific dimensions;
- type of glazing;
- whether the windows open or no;
- additional components – columns, pipes with columns, pipes with lids or extensions;
- additional accessories – sills, shields, mosquito protection nets /roller or opening/, types of handles, anti-burglary locking, etc.