Snippet to set number of products per page and per row on WooCommerce archives

product-row-page-amount.php

<?php

// SETS NUMBER OF PRODUCTS DISPLAYED PER PAGE
add_filter( 'loop_shop_per_page', 'new_loop_shop_per_page', 9999 );
function new_loop_shop_per_page( $cols ) {
	$cols = 30;
	return $cols;
}


// SETS NUMBER OF PRODUCTS DISPLAYED PER ROW
add_filter('loop_shop_columns', 'loop_columns');
function loop_columns() {
	return 3;
}

?>