Large button:

    <PrimaryButton size='l'>
        Click me
    </PrimaryButton>

Medium button (default):

    <PrimaryButton>
        Click me
    </PrimaryButton>

Small button:

    <PrimaryButton size='s'>
        Click me
    </PrimaryButton>

Extra small button:

    <PrimaryButton size='xs'>
        Click me
    </PrimaryButton>

Button with preloader

    <PrimaryButton isWaiting>
        Click me
    </PrimaryButton>