Internal Door Standard UK Sizes Chart

Metric (mm)	Imperial (feet & inches)	Imperial (inches)
1981 x 305	6ft 6" x 1ft	78" x 12"
1981 x 381	6ft 6" x 1ft 3"	78" x 15"
1981 x 457	6ft 6" x 1ft 6"	78" x 18"
1981 x 533	6ft 6" x 1ft 9"	78" x 21"
1981 x 610	6ft 6" x 2ft	78" x 24"
1981 x 686	6ft 6" x 2ft 3"	78" x 27"
1981 x 711	6ft 6" x 2ft 4"	78" x 28"
1981 x 762	6ft 6" x 2ft 6"	78" x 30"
2032 x 813	6ft 8" x 2ft 8"	80" x 32"
1981 x 838	6ft 6" x 2ft 9"	78" x 33"
1981 x 864	6ft 6" x 2ft 10"	78" x 34"
1981 x 913	6ft 6" x 2ft 11.9"	78" x 35.9"
2040 x 526	6ft 8.3" x 1ft 8.7"	80.3" x 20.7"
2040 x 626	6ft 8.3" x 2ft 0.6"	80.3" x 24.6"
2040 x 726	6ft 8.3" x 2ft 4.6"	80.3" x 28.6"
2040 x 826	6ft 8.3" x 2ft 8.5"	80.3" x 32.5"
2040 x 926	6ft 8.3" x 3ft 0.5"	80.3" x 36.5"

 

What are the most common internal door sizes?

To give you a general idea of the sizes available, we’ve listed some of the most common standard UK door sizes below. As with the doors on our website, we’ve listed them as height x width x thickness.

• 1981 x 457/533 x 35mm – This door size is often used for cupboard or wardrobe doors.
• 1981 x 610/686 x 35mm – A popular door size for restricted spaces where a smaller door is needed.
• 1981 x 762 x 35mm - Also called a 2’6” door, this is the most common internal door size in England and Wales.
• 1981 x 838 x 35mm – Also known as a 2’9” door, this is the best size for mobility and wheelchair acces

Which internal door thicknesses are available?

Our internal doors are available in various thicknesses, from the standard 35mm internal doors to 54mm FD60-rated fire doors. Thickness is always clearly listed on each product’s page at the end of the size. For a guideline of interior door thicknesses, you can use the following as a general rule of thumb:

• Internal Doors: 35mm - 40mm thick.
• Internal Fire Doors: 35mm - 54mm thick.

What’s the average width of a UK internal door?

Door widths vary across the UK. On average, England and Wales have a standard internal door width of 762mm, while Scotland’s is slightly smaller, at around 726mm.

Internal doors at Leader Online

Here at Leader Online, we have internal doors available in a range of standard sizes to suit specifications across the UK. Shop now to find the perfect match for your interiors.

External Door Standard UK Sizes Chart

Metric (mm)	Imperial (feet & inches)	Imperial (inches)
1981 x 686	6ft 6" x 2ft 3"	78" x 27"
1981 x 762	6ft 6" x 2ft 6"	78" x 30"
1981 x 838	6ft 6" x 2ft 9"	78" x 33"
1981 x 915	6ft 6" x 3ft	78" x 36"
2032 x 813	6ft 8" x 2ft 8"	80" x 32"
2040 x 726	6ft 8.3" x 2ft 4.6"	80.3" x 28.6"
2040 x 826	6ft 8.3" x 2ft 8.5"	80.3" x 32.5"
2040 x 926	6ft 8.3" x 3ft 0.5"	80.3" x 36.5"
2083 x 864	6ft 10" x 2ft 10"	82" x 34"
2134 x 915	7ft x 3ft	84" x 36"

 

Which external door thicknesses are available?

Generally, most external doors are 44mm - 54mm thick. However, this will vary depending on the type of door. For example, fully double-glazed folding patio door sets can be up to 70mm thick. As with internal doors, thickness will be listed on each product page at the end of the size. As a general guideline:

• External Doors: 44mm - 54mm thick.
• External Fire Doors: 44mm - 54mm thick.
• Garage Doors: 44mm thick.
• French Patio, Folding & Sliding Doors: 44mm - 70mm thick.

External doors at Leader Online

We have a great selection available if you’re looking for a new front door or any other type of external door. Our external doors come in various sizes and are strong and durable enough to keep out both bad weather and potential intruders.

Pair Door & Double Door Standard UK Sizes Chart

Pair door measurements need to be exact so that there’s no overlapping or gapping when you fit them in a double door frame; otherwise, they won’t fit together.

Metric (mm)	Imperial (feet & inches)	Imperial (inches)
1981 x 915	6ft 6" x 3ft	78" x 36"
1981 x 1067	6ft 6" x 3ft 6"	78" x 42"
1981 x 1168	6ft 6" x 3ft 10"	78" x 46"
1981 x 1220	6ft 6" x 4ft	78" x 48"
1981 x 1372	6ft 6" x 4ft 6"	78" x 54"
1981 x 1512	6ft 6" x 4ft 11.5"	78" x 59.5"

 

Garage Door Standard Sizes 

Garage doors differ from standard external or internal doors, so you’ll need to look at a separate set of standard garage door sizes to determine which will be best for your garage entryway from the house.

Metric (mm)	Imperial (feet & inches)	Imperial (inches)
1981 x 2134	6ft 6" x 7ft	78" x 84"
2134 x 2134	7ft x 7ft	84" x 84"

 

Fire Door Standard Sizes 

Fire doors are slightly thicker than standard doors by around 45mm. Their construction involves using extra components in the core to improve their fire rating. This means they cannot be trimmed down, so finding a fire door that fits is extremely important.

Typical imperial fire door sizes are:

•  27”x78”
•  30”x78”
•  22”x78”

They may also be available in smaller sizes of 24”x78”. 

Metric fire doors may also be available in standard sizes, including:

• 626mm x 2040mm
• 726mm x 2040mm
• 926mm x 2040mm

All of our standard UK door sizes are typically available in a fire door equivalent. Shop the full range today, or read our guide to fire doors to learn more.

French Door Standard Sizes 

French doors are available in a wide range of sizes, though some manufacturers offer more size options than others. Typically, internal French doors are either 35mm or 40mm thick, while external French doors are 44mm thick and are available in sizes from:

• 36”x78” - 42”x78”
• 46”x78”
• 48”78”
• 54”78”
• 60”78”

Consider fitting two single doors with a pair maker for larger French doors.