Make buttons the same size

Hi,
I’m trying to make buttons on top of one another the same size despite the text. I have tried the CSS that has been suggested to other users, but it hasn’t affected my buttons. I’ve already changed the size of my buttons and the font inside in CSS to make them larger using the following codes: Any other ideas? Thanks!

I’ve tried the following as well as a couple others that i found on the forum, but they haven’t made the buttons equal.
.avia-button.avia-size-large { min-width: 120px; }
.avia-button.avia-size-large { min-width: 127px; }

(I’m trying to get them both to be the size of the bottom button)

Thanks!
Kevin