Exterior door size guide
A quality exterior door is a long-term investment in a residential or commercial property, protecting it from adverse weather conditions, drafts, dust, and foreign sounds while also providing security and enhancing the building's appearance.
To ensure doors last, it is crucial to properly match the width and height of the slab (and transom and sidelites, if necessary) to the rough opening before purchasing and installing. Below, we will provide complete information about the dimensions of the front doors.
Standard exterior door size
The most common slabs are 36 x 80 inches. This size fits almost all configurations.
The chart summarizes the dimensions of exterior doors.
Measurement
Value, inches
Description
Standard single exterior door sizes
Our product range includes entrance doors in a variety of sizes, ensuring that every customer finds the perfect option.
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Nominal height: 80, 82, and 96''.
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Nominal width: 36, 38, 48, 50, 62, 64, and 68''.
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Thickness: 1 7/8'' and 2 1/16''.
Belldinni produces high-quality door models with the following mirrored or glazed (clear or frosted glass) decorative elements in black, anthracite, or white:
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A transom is a horizontal stationary section above the door.
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A sidelite is a narrow, vertical window that sits to the right, left, or both sides of the front door.
Door size, inches
Door size, feet
Actual unit size, inches
Rough opening size, inches
Door type
Belldinni sidelite sizes
Standard double exterior door sizes
Double exterior doors consist of two slabs that open from the center and are suitable for wide doorways.
They typically come in the following standard total widths (measured from edge to edge of both door slabs, not including the frame): 60 to 72 inches or 5 to 6 feet. The most common standard height for double front doors is 80 to 96'' (6.7 to 8'). The slab thickness is, in most cases, 1 7/8'' or 2 1/16''.
Standard patio door sizes
Typically, sliding glazed doors (French collection) are installed for patios, offering a compact, ergonomic, and practical solution. They slide on a track along the wall, saving valuable space in the house and allowing in a considerable amount of natural light, which in turn helps reduce energy costs.
The most common patio slabs are 72 x 80 inches.
Standard garage-to-house front door sizes
The door connecting a garage to the house—often referred to as the garage entry door—must meet specific building code requirements for safety, particularly in terms of fire resistance and energy efficiency. These doors also feature standard sizing, making replacement and installation more straightforward. The width typically ranges from 32 to 36 inches, and the height is 80 inches.
FAQ
What is the most common size for an exterior door?
The most common standard size is 36 inches wide and 80 inches high.
What is the difference between door size and rough opening size?
The rough opening is the area in the wall where the door unit (including the door frame, slab, and hardware) will be installed, so its dimensions should be larger than the size of the door. For a detailed guide on determining measurements, see our article.
How do you measure the size of an exterior door?
To correctly determine the size of the exterior door for the rough opening, it is essential to take several measurements of its height and width to avoid inaccuracies. For step-by-step instructions, see our article.