# tmux_select:size/1

- **Package:** libtmux_erlang
- **Language:** Erlang
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-erlang/blob/d1b6308440cf9eb8f6647e7ae434bce60e849368/apps/libtmux_erlang/src/tmux_select.erl#L192
- **Page:** https://libtmux.org/en/erlang/latest/reference/tmux_select-size-1/

```
size/1
-spec size(t()) -> non_neg_integer().
```

Return the cached number of materialized rows in this selection without traversing tmux or re-evaluating criteria.

## Parameters

- `Argument1` (`t()`)