How to re-size the "submit" button?

Hello...I'm creating a course in Spanish.  I've updated the text labels in the Player template to select "spanish" as the default language.  So now the "continue" and "submit" buttons are in Spanish.  They remain the same size however, so they look cut off, like the word in the small red box.  It should say "sigue" but all that people can see is "sig...

How do I resize the button? 

Thanks, Barbara