In order for the Express button to fit into the aesthetic of your website, we offer three different button shapes. The button shapes offered are rectangle with rounded corners (default) , rectangle and pill shaped. You may choose which one to use in the following manner:
Setting the parameter: data-shape='default' will render the button as a rectangle with rounded corners. In case the parameter 'data-shape' is not specified it will automatically take on the "default" value.
Setting the parameter data-shape='rect' will render the Express button as a rectangle with square corners.
Setting the parameter data-shape='pill' will render the Express button as a pill shaped button.