Well? Are they? As you design your mobile-friendly site, remember to make your buttons finger-clickable. The touch screen on your tablet or phone is designed primarily for the pad of your index finger or your thumb.
Smaller buttons are harder to hit accurately and that’s a time waster. The user may have to shift to touch the button with tip of the finger – and if the touch is inaccurate, go back and make a correction. This is a familiar situation for folks entering passwords on mobile phones where the targets are smaller and closer together.