Smart Coupons for WooCommerce

It’s great that we can control how the coupon looks using CSS, but it’s awfully difficult to get an image on the coupon. Sure background-image works, but then it doesn’t appear if the customer prints it. Also, it’s very hard to control the size of how it prints — and I’d like for the print out to be sized like a credit card, so it can fit in someone’s wallet.