# \Big

Manual fixed-size delimiter used as an ordinary math symbol when automatic \left...\right sizing is undesirable.

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

## 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 delimiter used as an ordinary math symbol when automatic \left...\right sizing is undesirable.

## Common tasks

### How to make a larger parenthesis than \big

Size ladder: \big < \Big < \bigg < \Bigg.

```latex
\Big( \frac{a}{b} \Big)
```

[Open in Playground](https://play.texform.dev/?input=%5CBig%28+%5Cfrac%7Ba%7D%7Bb%7D+%5CBig%29)

### How to size a large absolute-value bar

```latex
\Big| \sum_i a_i \Big|
```

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

## Examples

```latex
\Big(
```

[Open in Playground](https://play.texform.dev/?input=%5CBig%28)

```latex
\Big\langle
```

[Open in Playground](https://play.texform.dev/?input=%5CBig%5Clangle)

```latex
\Big{(}
```

[Open in Playground](https://play.texform.dev/?input=%5CBig%7B%28%7D)

## Renderer support

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

## Usage frequency

2.69% of formulas in the measured corpus contain this entry, rank 22 of 263 entries with frequency data.

## In TeXForm

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

### [base/Big-delimiter-size-drop](https://texform.dev/rules/base/Big-delimiter-size-drop)

Drop the fixed delimiter size imposed by \Big.

Level: equiv. Fidelity: reading.

```latex
\Big (
```

→

```latex
(
```

```latex
a\Big(b
```

→

```latex
a(b
```

## See also

- [\\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)
- [\\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 |
| --- | --- | --- | --- | --- |
| \Big ( | Positive: baseline | Pass | Pass | Pass |
| \Big a | Negative: neg:D[0] | Fail | Fail | Fail |