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Help & Advice

Standard Door Sizes

Here at DirectDoors, we are here to help you with your sizing and want to give you as much guidance as possible to ensure you are getting the most appropriate door for your needs.

There are many different doors sizes throughout the UK but most homes and properties will usually correspond with standard door sizes, most of our standard doors whether it is internal or external are stock items, therefore it is a quick turnaround time.

The following sizes are UK standard door widths: 

  • 457mm (18") - more commonly used for narrow cupboards. 
  • 533mm (21")
  • 610mm (24")
  • 686mm (27")
  • 762mm (30")
  • 838mm (33") 

Many customers ask us, how tall is a standard door? The usual standard door height is 1981mm (78") whilst the width can vary, the two most popular standard door widths within the UK are 762mm (30") and 838mm (33"), the 838mm size is also more commonly known as Part 'M' Compliant for Disability Access.  

It can be confusing trying to understand what door size you require or how to measure the door itself, it's always good to do your research before purchasing to ensure you are getting only the best quality for the right cost.

Our range of standard internal door sizes come in a wide variety of finishes such as Oak, White, Walnut or even the more popular Grey finish and the styles we have to offer vary from contemporary, modern and even more traditional styles, so we have an option for everyone. 

We also have a wide range of External standard size doors, whether you are looking for a Timber, Composite, PVC or even a Tricoya door, we are sure to have the door for you. 

All the doors on our website are listed in millimeters but can be converted at the click of a button, however for those who may measure in different terms such as feet and inches, our helpful conversion chart is below so you can see exactly what the sizes are, so there is no confusion:

Standard Door Size Conversion Chart 

Metric (mm) Imperial (inches) Imperial (feet & inches) 
1981mm x 457mm 78" x 18" 6' 6'' x 1' 6''
1981mm x 533mm 78" x 21" 6' 6'' x 1' 9''
1981mm x 610mm 78" x 24" 6' 6'' x 2' 0"
1981mm x 686mm 78" x 27" 6' 6'' x 2' 3''
1981mm x 762mm 78" x 30" 6' 6'' x 2' 6''
1981mm x 838mm 78" x 33" 6' 6'' x 2' 9''

Important: Do not assume all internal doors in your house are the same size or thickness, check them all.

Once you have measured your doors, you may notice that the doors in your home or property may vary ever so slighty from a few millimeters here or there but not to worry, our doors also have a small allowance for trimming to ensure the perfect fit. 

Most doors are readily available in the above sizes as standard and can be delivered within 3-4 working days and for free to most UK Mainland postcodes. 


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