# \Bigm

Manual fixed-size middle or relation-style delimiter, especially for bars in conditional expressions or set-builder notation, when automatic \left...\right sizing is undesirable.

https://texform.dev/latex/commands/Bigm

## Metadata

| Field | Value |
| --- | --- |
| Topic | [Delimiters](https://texform.dev/latex/topics/delimiters) |
| Packages | base |
| Allowed mode | math |
| Tags | presentation |
| Commonality | medium |
| Kind | prefix |

## Syntax

### base

Argument specification: `m:D`

Manual fixed-size middle or relation-style delimiter, especially for bars in conditional expressions or set-builder notation, when automatic \left...\right sizing is undesirable.

## Examples

```latex
\Bigm|
```

[Open in Playground](https://play.texform.dev/?input=%5CBigm%7C)

```latex
\Bigm\|
```

[Open in Playground](https://play.texform.dev/?input=%5CBigm%5C%7C)

```latex
\Bigm{|}
```

[Open in Playground](https://play.texform.dev/?input=%5CBigm%7B%7C%7D)

## Renderer support

| Package | MathJax | KaTeX | XeTeX |
| --- | --- | --- | --- |
| base | full | full | full |

## Usage frequency

<0.01% of formulas in the measured corpus contain this entry, rank 182 of 263 entries with frequency data.

## In TeXForm

TeXForm parses this entry as prefix syntax; the package determines its argument specification.

### [base/Big-class-variants-to-Big](https://texform.dev/rules/base/Big-class-variants-to-Big)

Collapse \Bigl, \Bigr, \Bigm to \Big.

Level: corpus. Fidelity: reading.

```latex
\Bigl #1
```

→

```latex
\Big #1
```

```latex
\sin\Bigl(x
```

→

```latex
\sin\Big(x
```

## See also

- [\\big](https://texform.dev/latex/commands/big)
- [\\Big](https://texform.dev/latex/commands/Big)
- [\\bigg](https://texform.dev/latex/commands/bigg)
- [\\Bigg](https://texform.dev/latex/commands/Bigg)
- [\\biggl](https://texform.dev/latex/commands/biggl)
- [\\Biggl](https://texform.dev/latex/commands/Biggl)
- [\\biggm](https://texform.dev/latex/commands/biggm)
- [\\Biggm](https://texform.dev/latex/commands/Biggm)
- [\\biggr](https://texform.dev/latex/commands/biggr)
- [\\Biggr](https://texform.dev/latex/commands/Biggr)
- [\\bigl](https://texform.dev/latex/commands/bigl)
- [\\Bigl](https://texform.dev/latex/commands/Bigl)
- [\\bigm](https://texform.dev/latex/commands/bigm)
- [\\bigr](https://texform.dev/latex/commands/bigr)
- [\\Bigr](https://texform.dev/latex/commands/Bigr)

## Test cases

### base

| Input | Case | MathJax | KaTeX | XeTeX |
| --- | --- | --- | --- | --- |
| \Bigm ( | Positive: baseline | Pass | Pass | Pass |
| \Bigm a | Negative: neg:D[0] | Fail | Fail | Fail |