How do I change the Gutter Width in VS Code?

How do I make the gutter width a larger size? I want it 4-5x the current width.

See the following image:

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What is VS Code gutter?

Gutter indicators If you open a folder that is a Git repository and begin making changes, VS Code will add useful annotations to the gutter and to the overview ruler. A red triangle indicates where lines have been deleted. A green bar indicates new added lines. A blue bar indicates modified lines.

The width is a generated dynamic value, derived from several measurements, directly within VScode. See here for an idea what going on there. It is not trivial to change this. You would have to dig into the code yourself and be prepared for ill effects.

There's a GitHub issue referencing this SO question, so you might want to contribute your reasoning and/or code submissions there.