Different swatch sizes for desktop and mobile

I’m wondering if you can provide guidance on displaying different size swatches between desktop and mobile? I had the swatches disabled on mobile with the code below, however I would like them to display on mobile, but at a different size than what is defined in the plugin settings.

add_filter('default_woo_variation_swatches_single_product_dropdown_html', function($default){
if ( wp_is_mobile() ) {
return true;
}
}, 10, 1);


Thank you!

Joanna