How to Choose the Right Window Size

When looking for new replacement windows, you will discover that most windows companies offer them in a few standard sizes. Most rough openings in homes can accommodate these windows. There will be exceptions, but manufacturers design windows that will fit most homes.

Right Window Size

To determine the right one for your home, you’ll have to take the following factors into account.

  1. Daylighting Requirements

Choose a window size that meets your daylighting demands. Larger picture windows, for example, allow you to brighten dark regions of your home. These include rooms facing north or south. Larger windows assist frame magnificent views of the outdoors without transferring too much heat.

  1. Local Codes and Regulations

The choice between tiny and large windows is personal. However, you must still consider the local building laws and restrictions. They specify the window size for certain rooms, such as the bedroom, bathroom and basement. These rules must be followed to protect your family’s safety.

  1. Standard vs. Custom Window Sizes

Most replacement windows come in a few standard sizes. Replacement windows experts will use a simple notation to assist you to establish the rough opening size. If you live in an older home, your new window units may need to be custom-sized. After all, homes built before mass-produced windows tend to have oddly shaped apertures.

Common Window Sizes

  1. Double-Hung Window Sizes

Double-hung windows are the most popular window type in America. Because double-hung windows are so common, they come in numerous conventional sizes.

  • Width: 24 to 48 inches (61 cm – 1.2 m)

  • Height: 36 to 72 inches (0.9 – 1.8 m)

  1. Bay Window Sizes

Projection windows include bay windows. Two smaller side windows (flankers) at an angle of 30 or 45 degrees to the wall.

  • Width: 42 to 126 inches (1 – 3 m)

  • Height: 36 to 78 inches (91 cm – 2 m)

  1. Sliding Window Sizes

Sliding contemporary doors and windows open and close on a track, making them ideal for compact spaces with limited ventilation, like above a kitchen sink or in a bathroom.

  • Width: 36 to 84 inches (91 cm – 2.1 m)

  • Height: 24 to 60 inches (61 cm – 1.5 m)

  1. Picture Window Sizes

Picture windows are perfect for areas with a view and lots of wall space. Other window kinds can’t match their architectural charm.

  • Width: 24 to 96 inches (61 cm – 2.4 m)

  • Height: 12 to 96 inches (30.5 cm – 2.4 m)

  1. Casement Window Sizes

The casem
ent windows will completely ventilate your room. This type is ideal for hot climates that rely on breezes.

  • Width: 14 to 35.5 inches (35.5 – 90 cm)

  • Height: 29.5 to 77.5 inches (75 cm – 1.95 m)

  1. Awning Window Sizes

An awning window, like hinged French doors, offers a wide view and great security. This weatherproof option allows you to open it fast even in light rain.

  • Width: 24 to 46 inches (61 cm – 1.2 m)

  • Height: 20 to 92 inches (51 cm – 2.3 m)



When it comes to improving the beauty, comfort and energy efficiency of your Detroit area home, look to Kroll Construction, the leading replacement windows company in Michigan, where relationships are built on trust!

Call us today at (888) 338-6340 or fill out our contact form to schedule a FREE in-home consultation and estimate for your home improvement project. We serve clients in Detroit, Michigan. 

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