By default size of macOS Terminal in Big Sur is 80 (Columns) x 24 (Rows), if you want to change this ratio, you can do that by following the below steps,
- Open Terminal App,
- Go to Terminal Menu: Terminal -> Preferences...
- Go to Profiles,
- Click on Window tab,
- Look for Window Size, change the values for Columns and Rows according to your requirement,
- As you close Preferences, you will see that changes are refected instantly.

Resize macOS Terminal Window
βοΈThis will not make the size of the Terminal fixed, you can resize it by stretching the edges!
βοΈ Check out more posts related to macOS
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