Hi there,
You’d need to edit /woocommerce/archive-product.php lines 41-51 based on what sidebar setup you want (edit the values):
$columns = 4;
if ($sidebars == "no-sidebars") {
$woocommerce_loop['columns'] = apply_filters( 'loop_shop_columns', 4 );
} else if ($sidebars == "both-sidebars") {
$woocommerce_loop['columns'] = apply_filters( 'loop_shop_columns', 2 );
$columns = 2;
} else {
$woocommerce_loop['columns'] = apply_filters( 'loop_shop_columns', 3 );
$columns = 3;
}
And you’d also need to edit the css for each of the responsive sizes. You can find this in style.css and /css/responsive.css
– Ed