How do I style select2?

Does anyone have an example on how they style the select? With width, height, etc?

The “Appearance” section of the Select2 documentation provides some details (especially about how to set the width). If you want to provide your own “theme”, there isn’t much documentation. I would suggest going to the Select2 GitHub repo and looking at the theme files there. You could probably copy one and change it to fit your needs.