Brick dimensions decide how many bricks you buy, how your courses line up, and how much mortar you mix. The most common US brick, the modular, has a brick length of 7-5/8 inches.
Other types run shorter or much longer, so let’s walk through each one.
How Big Are Bricks?
A standard US brick measures about 3-5/8 inches wide, 2-1/4 inches high, and 7-5/8 to 8 inches long. It fits comfortably in one hand and weighs roughly 4 to 5 pounds.
Sizes shift by region, manufacturer, and brick style. One yard’s “standard” brick can differ slightly from another’s. Check the supplier’s spec sheet before you order.
If you want to skip the maths while you read, our free building and material calculators can handle the quantities for you.
Actual vs Nominal Brick Measurements
Nominal size equals the actual brick size plus one mortar joint. Actual size is what you measure with a tape.
A modular brick shows the difference well. Its actual size is 3-5/8 x 2-1/4 x 7-5/8 inches, and its nominal size is 4 x 2-2/3 x 8 inches. The 3/8 inch joint fills the gap. Three courses rise exactly 8 inches.
Designers draw plans in nominal sizes. Masons check actual sizes on site. Mixing the two up causes most ordering mistakes.
Standard Brick Dimensions Chart (US)
Common US bricks run from about 1-5/8 to 3-5/8 inches high and from 7-5/8 to 11-5/8 inches long. This chart lists actual sizes in inches as width x height x length.
| Brick Type | Actual Size (W x H x L) |
|---|---|
| Modular | 3-5/8 x 2-1/4 x 7-5/8 |
| Standard | 3-5/8 x 2-1/4 x 8 |
| Engineer | 3-5/8 x 2-3/4 x 7-5/8 |
| Closure | 3-5/8 x 3-5/8 x 7-5/8 |
| Roman | 3-5/8 x 1-5/8 x 11-5/8 |
| Norman | 3-5/8 x 2-1/4 x 11-5/8 |
| Utility | 3-5/8 x 3-5/8 x 11-5/8 |
Treat these bricks measurements as typical values. Makers can vary them by a fraction of an inch.
Average Size of a Brick
The average size of a brick in the US is about 3-5/8 x 2-1/4 x 7-5/8 inches. That is the modular brick, the most popular residential size.
Most house walls, chimneys, and garden walls use it. Its small face makes cutting and laying easy. It also keeps mortar lines tidy.
Brick Size With Mortar
A modular brick with mortar occupies 4 inches in width and 8 inches in length. That includes a standard 3/8 inch joint.
Brick height with mortar comes to about 2-2/3 inches for a modular unit. So three courses reach 8 inches, and six courses reach 16 inches.
Joints usually run 3/8 to 1/2 inch. Thicker joints raise a wall faster, but they weaken the bond and change the look. Keep them even from the first course to the last.
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Use Our Brick CalculatorHow Many Bricks Do You Need?
A modular wall needs about 6.75 bricks per square foot, joints included. A 100 square foot wall therefore needs about 675 bricks. Most builders add 5 to 10 percent for cuts and breakage.
Doing this by hand gets tedious on bigger jobs. Our brick calculator works out the count from your wall size, joint thickness, and waste allowance in seconds. Subtract doors and windows first, and the number gets even tighter.
King and Queen Brick Sizes
King and queen bricks are larger than modular units. Both run about 9-5/8 inches long and 3 inches wide.
A king brick stands roughly 2-5/8 inches high. A queen brick stands roughly 2-3/4 inches high. Makers differ, so confirm exact numbers with your supplier.
These bricks cover more area per unit. You lay fewer of them per square foot, and the work moves faster. Fewer joints also save mortar.
Brick Measurements Around the World
The standard UK brick measures 215 x 102.5 x 65 millimetres. Add a 10 millimetre joint and the work size becomes 225 x 112.5 x 75 millimetres.
Four UK courses rise 300 millimetres. That makes vertical planning easy.
Australian bricks are bigger. The common size is 230 x 110 x 76 millimetres. Always confirm which system your supplier uses, because a small mismatch adds up fast across a tall wall.
Understanding Brick Length, Width and Height
Brick length is the longest side, width is the wall’s depth, and height is the face thickness you see in each course. Masons also name bricks by how they sit.
A stretcher lies with its long side showing. A header shows its short end. A soldier stands upright. Each position changes how many bricks you need per square foot.
How to Choose the Right Brick Size
Pick the size that fits your project, your budget, and the look you want. Start with what the wall has to do.
- Homes and chimneys: modular or standard bricks work best.
- Modern facades: Roman, Norman, or queen bricks give a long, linear look.
- Heavy loads and speed: engineer and utility bricks help.
- Repairs: match the old brick’s actual size, not its nominal size.
Matching matters most in repairs. A small height difference breaks the course line, and the wall looks patched.
Some projects mix materials. Brick veneer over a block backup wall is common. Our concrete masonry tools cover block sizes so both layers line up.
Common Brick Sizing Mistakes to Avoid
Most errors come from three habits. Fix them and your order gets far more accurate.
- Buying by nominal size. Nominal sizes include mortar, so they overstate the real brick.
- Ignoring the joint. A 3/8 inch joint changes the count noticeably across a large wall.
- Skipping waste. Cuts, chips, and corners all eat extra bricks.
A quick call to your supplier can save you a full pallet.
Final Thoughts
Brick sizes look simple, but small differences matter. Know the actual size, the nominal size, and the joint. Then compare your wall against the chart above.
Measure twice, order once, and keep a sensible buffer for waste.