Measure it!
Simple Ruler Extension
You can change the color of background and selection in the Options tab.
Source Manifest.json
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User reviews
Alex Kashitaryan (ID: 0000002cc5db5e46) Voted 1 ★ - Updated 09/13/2023
Nikolay (ID: 00000082bdcd0ac9) Voted 1 ★ - Updated 07/21/2023
Ricardo Martinez (ID: 000000fb31f7242c) Voted 4 ★ - Updated 08/26/2022
Георгий Албегов (ID: 00000078154e8b63) Voted 1 ★ - Updated 07/30/2022
Abel Brickle (ID: 000000fce27da4b5) Voted 2 ★ - Updated 07/28/2022