# window.SplitOptions.size

- **Module:** window.SplitOptions
- **Package:** libtmux
- **Language:** Rust
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-rs/blob/8a648c0894dfffc9303583f753b6c8ae01f2fe76/crates/libtmux/src/window.rs#L1663
- **Page:** https://libtmux.org/reference/rs/window-splitoptions-size/

```
window.SplitOptions.size(mut, size: PaneSize) -> Self
```

Give the new pane a size, in cells or as a share of the space.