I tried simple donate extension on my Civi 4.6/Wordpress/Stripe install to mix things up. It seems that the buttons are way too large for some reason. Anyone have a suggestion on fixing?
With a default-ish theme, the SimpleDonate extension intends to make the form elements bigger and more clicky. In this case that has not worked out - possibly because of other styles introduced by your theme or other plugins.
However: those button styles you're seeing are coming from the SimpleDonate extension. And that's OK - you can address this by overriding with your own theme's CSS. Even just adding a style which cleared the buttons into rows of three would improve what you're seeing.
The liberal use of
!important in SimpleDonate's CSS may be a sticking point when overriding the extension's builtin styles. If I had to make that CSS work, the first thing I'd do would be replace every instance of
!important with an appropriate CSS selector (and submit the PR back to SimpleDonate).
Best talk to your WordPress "theme" author, as this is ultimately down to that (though any coder could probably help).
If this is a default theme that ships with WordPress then you should log a bug on the extension's GitHub page here: https://github.com/drastik/com.drastikbydesign.stripe/issues
Hope that helps :)