FindMyBrick · Brick measurement guide
How to Measure a Brick Correctly
Accurate measurements can help narrow down a replacement brick, especially when several products look similar in a photograph.
Important: Measure a representative brick where possible. Old, handmade and weathered bricks may vary, so measure more than one if you can.
Which measurements do you need?
LengthThe longest dimension of the brick, usually measured from one end to the other.
WidthThe depth of the brick from the front face to the back.
HeightThe shorter vertical dimension when the brick is laid normally.
Mortar jointThe approximate thickness of the mortar between bricks. This helps explain differences in overall course height.
Step-by-step method
- Choose a clean brick with accessible edges.
- Use a tape measure, ruler or digital calliper where available.
- Measure the brick itself, not the surrounding mortar.
- Record each dimension in millimetres.
- Repeat the measurements on another brick and note any variation.
- Photograph the brick beside the measuring tool so the scale is clear.
Common mistakes to avoid
- Measuring across the mortar joint instead of the brick.
- Assuming every brick in an old wall is exactly the same size.
- Measuring a damaged corner and treating it as the original dimension.
- Relying on a nominal product size without checking the actual sample.
- Forgetting that the mortar joint changes the apparent height of a course.
Use measurements with a photo
Upload a clear photograph to FindMyBrick and add the length, width and height when you have them. The measurements help narrow the shortlist, but they do not prove an exact manufacturer or product code.
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