The classic 762 mm × 1981 mm door, also known as “2’6” × 6’6”, is a favourite in UK homes, offering reliable access without dominating a room. In new builds, particularly contemporary developments, taller doors (2040 mm) are often used to give that extra feeling of space and height.

Depending on the room and style, standard interior door sizes might range from 686 mm wide (for more compact openings) up to 926 mm for wheelchair-friendly access.

Just as there are countless window styles, doors come in all shapes and sizes too. A bi-fold door, for instance, won’t match the dimensions of a traditional front replacement door.

Each design has its own role, whether it’s opening up your garden or keeping your home secure.

Knowing the UK standard door sizes from the start can save time, prevent installation snags, and help you choose with confidence.

Also called double doors, these usually span from around 915 mm (3 ft) up to roughly 1512 mm (just under 5 ft) across the pair, with a common height of 1981 mm (6 ft 6 in).

They’re great for wider interior openings or statement entrances where you want symmetry.

Classic, light-loving and ever popular. Internal French doors are typically 35–40 mm thick; external sets are often a sturdier 44 mm to boost insulation and security. Widths usually range from about 914 mm (36 in) to 1524 mm (60 in) across the pair, making them adaptable from snug cottages to generous patio openings.

Add side panels if you’d like to stretch the glazing and pull in even more natural light, especially if they’re sitting alongside your double glazed windows.

Here the standard door sizes are all about panel configuration. A compact two-panel slider might come in around 1800 mm wide, while a larger bi-fold can run to 6,400 mm+ across six or seven panels for a real wall-of-glass effect.

Always match the system to your aperture width and remember to allow for stacking or parking space when the doors are open.

For single garages in the UK, two go-to sizes are 1981 mm × 2134 mm (6 ft 6 in × 7 ft) and 2134 mm × 2134 mm (7 ft × 7 ft). You’ll commonly see these in up-and-over or sectional designs, though roller options are also available.

If you’ve got a side personnel door, check whether it needs to satisfy Building Regulations for fire escape, especially if it’s the only alternative way into or out of the house.

Safety-led and more tightly regulated. Imperial leaf widths of 27 in, 30 in, and 32 in are common; metric fire doors often follow a 2040 mm height with widths such as 626 mm, 726 mm, and 926 mm.

Performance ratings like FD30 (30 minutes) and FD60 (60 minutes) affect the full assembly: you’ll need suitable intumescent seals, correct frame clearances, certified ironmongery, and proper installation to stay compliant.