This is a really simple observation, but relevant to the side project I have started to work on for my wife (more to come later)

If we create a simple Bootstrap button

<button type="button" class="btn btn-default">Single toggle</button>

It looks something like this in firebug

Looking at the .btn style on the right we can see border-radius: 4px

Messing with this value can create a much more rounded button – if that is your desire

This is border-radius: 20px – Cool 🙂