These are the **solutions I worked on**, based on your suggestions.

**I still don't know what option will derive on the best experience**, a solution that helps:

1. Users to intuit the expected input (format, average characters).
2. Users to understand the labels (self-explanatory) (tooltips provided for difficult questions)
3. The form to be as readable as possible (help eye tracking)
4. The form to be beautiful, consistent.

Please refer to the most suitable option, according to the needs above. Thanks!

[![Options to show and place form labels, that work for short input fields][1]][1]


  [1]: https://i.sstatic.net/Jn1nj.png