<?php
/**
 * Adds new responsive ad unit sizes to the selectable options when creating an ad
 */
function example_adsanity_ad_sizes( $sizes = array() ) {

	$sizes['1x3'] = __( '1x3 - Responsive', 'example' );
	$sizes['2x3'] = __( '2x3 - Responsive', 'example' );

	return $sizes;

}

add_filter( 'adsanity_ad_sizes', 'example_adsanity_ad_sizes' );