# format_modifier.size

- **Language:** C
- **Kind:** attribute
- **Source:** https://github.com/tmux/tmux/blob/e476c1230b958df0cb12977517d24b3dc931375b/format.c#L189
- **Page:** https://libtmux.org/en/tmux/latest/reference/c-struct-format_modifier-size/

```c
u_int size;
```

## Referenced by

- [`format_add_modifier`](/en/tmux/latest/reference/c-function-format-c-format_add_modifier/) (function)