What is the best size of the bedroom window?

Generally, bedroom windows have a certain size. In general buildings, the height of the window is generally set as 1.5m, the height of the window sill is generally 0.9m, and the distance between the window and the window top is 2.4m, which generally requires a structural height of 0.4m.. The height of windows and sills in some public buildings varies from 1.0 to1.8m. The height from the bottom of the window sash opening to the public walkway should not be less than 2.0m As for the height of windows, it should be determined according to the requirements of lighting, ventilation and spatial image. However, we must pay attention to the problem of excessive rigidity of windows, and add beams or "spelling" when necessary. In addition, protective measures should be taken when the window sill height is lower than 0.8m