UK brick sizes and dimensions
Brick dimensions are one of the most useful clues when identifying an existing brick. Colour and texture can look very similar across different products, but length, width and height can help narrow down the possibilities.
📷 Identify my brickCommon UK brick dimensions
Many modern UK facing bricks are manufactured close to the traditional size shown below. This is a reference point rather than a guarantee: individual manufacturers, ranges and older bricks can differ.
| Measurement | Common reference | What it means |
|---|---|---|
| Length | About 215 mm | The longest face of the brick |
| Width | About 102.5 mm | The depth of the brick |
| Height | About 65 mm | The vertical thickness when laid normally |
How to measure a brick correctly
- Measure the brick itself, not the mortar joint.
- Use a tape measure, ruler or vernier calliper where possible.
- Record the length, width and height in millimetres.
- Measure more than one brick if the wall is old, handmade or weathered.
- Write down whether the measurement was taken from a loose brick or from brickwork in situ.
Why dimensions help identify bricks
Two bricks may have almost identical colours and textures but belong to different product ranges. Dimensions provide another useful filter when comparing possible matches in the Find My Brick catalogue.
- Length can help separate similar-looking brick ranges.
- Width matters when matching wall thickness and detailing.
- Height affects brick coursing and the position of mortar joints.
- Unusual dimensions may indicate an older, handmade, imperial or specialist brick.
Modern, imperial and older bricks
Brick sizes vary with age, manufacturer, manufacturing method and product range. Historic and reclaimed bricks should not automatically be compared with modern standard-sized products.
Older bricks may be shorter, taller, thinner, wider or less uniform. Handmade bricks can also vary from one brick to the next. If you are matching an old wall, take several measurements and compare a physical sample before ordering a large quantity.
Brick size and mortar joints
Brick dimensions are not the same as the overall height of a course of brickwork. The course also includes the mortar joint. This is why a wall measurement divided by the brick height may not give an exact brick count.
For replacement work, match the existing brick size and the existing coursing. A brick that looks right in a photograph may not sit correctly if its height or length is different.
Using dimensions with Find My Brick
Measurements are optional in the Find My Brick identifier. Upload a clear close-up photo first, then add length, width and height if you know them. Combining visual evidence with measurements can help narrow down close UK catalogue matches.
For the best result, include the brick face, texture, edges, any frog or maker's mark, and a photo taken in natural light.
Frequently asked questions
Should I measure the mortar joint?
No. Measure the brick itself. Mortar joints vary and may lead to an incorrect size being recorded.
Can a photo identify an exact brick?
A photo can narrow down likely matches, but lighting, weathering, production runs and similar product ranges mean an exact identification cannot always be guaranteed.
Why does my brick look a different colour in photos?
Daylight, shadows, camera processing, wet surfaces, staining and cleaning can all affect apparent colour. Compare samples in natural light.
What if my brick is an unusual size?
Measure several examples and check whether the brick is old, handmade, reclaimed or a specialist product. Unusual dimensions can be an important identification clue.
Should I order replacements before checking a sample?
For important repair or extension work, compare a physical sample with the existing wall before ordering a large quantity.