How to reproduce:
1. Open the attached "19.3 Packages.zip" Project
2. Open Tools > ProBuilder > ProBuilder window
3. Press + next to New Shape button to open Shape Tool
4. Choose Stair from the Shape Selector drop-down
5. See Steps, Width, Height, Depth text fields

Expected Behaviour: The fields are the right size and fit the numbers
Actual Behaviour: The fields are too small

Reproducible with(Unity versions): 2019.3.0b3, 2019.3.0b5, 2020.1.0a2, 2020.1.0a6
Not reproducible with: 2018.4.10f1, 2019.3.0b2, 2020.1.0a1
Reproducible with(Package Versions): 4.0.5, 4.1.0

Note: 2017.4 does not have packages, could not check.