If you want something a little more unique, try searching Etsy. This Etsy seller specializes solely in covers for ironing boards, and has everything from a bold teal and pink peacock feather pattern, to a more subtle Marimekko-like poppy cover.
Make your ironing board something to show off, rather than hide! Etsy seller GaranceCouture has an amazing shop chock full of unique ironing board covers. This crafty sewer uses a 100% cotton quilting fabric that's completely encased in matching bias tape. It's completely machine washable, and will fit any standard sized ironing board.
— Vanessa Brunner