This article explains how to customize the Windows Terminal’s launch size in Windows 11, a feature supported by its many advanced functions such as multiple tabs and Unicode support. The launch size is determined by the settings for the number of character columns (width) and rows (height). The tutorial explains a step-by-step guide to making these changes.
This article explains how to change the Windows Terminal launch size so that it always keeps the number of character columns and rows displayed in the window upon the first launch.
Windows Terminal is a modern host application for the command-line shells, including Command Prompt, Windows PowerShell, and bash (via Windows Subsystem for Linux (WSL)).
Unlike the previous shell apps in Windows, Windows Terminal has many features, including multiple tabs, panes, Unicode and UTF-8 character support, a GPU-accelerated text rendering engine, and themes customization with text, colors, backgrounds, and shortcuts.
Windows Terminal uses several characters for the columns (width) and rows (height) to measure the size of the launch window.
You can change the columns and rows for the window anytime, and the steps below show you how.
Change the Terminal window size
As described above, Windows lets you change the size of the Terminal app so that it’s always the desired size when you launch.
Here’s how to do that.
First, open the Windows Terminal app.
You can do that by clicking on the Start menu and searching for Terminal. Then, under Best match, select and open the Windows Terminal app.

When the Terminal app opens, click the down arrow button on the top bar, and select Settings (Ctrl +,).

On the Settings window, click on the Startup tab.

On the Settings -> Startup tab, select the Launch size tile to expand it. Then enter the number of characters for the Columns (width) and Rows (height) in the size you want to use.
The default size for Columns is 120 characters, and the default size for Rows is 30 characters.

Click on the Save button to save your changes and exit.
That should do it!
Reference:
https://learn.microsoft.com/en-us/windows/terminal/customize-settings/startup#launch-size
Conclusion:
This post showed you how to change the launch size window in the Windows Terminal app in Windows 11. If you find any errors above or have something to add, please use the comment form below.