Material Design: Button
paper-character is a floating action button. It contains one or two characters in the center and
comes in two sizes: regular size and a smaller size by applying the attribute mini. When
the user touches the button, a ripple effect emanates from the center of the button.
Example:
<paper-character>1</paper-character>
<paper-character mini>A</paper-character>
<paper-character>&</paper-character>