vinylfruit's Etsy shop has about 52 vinyl decals you can purchase. When we performed our virtual stroll of their shop, their "Whale of a Wall" vinyl wall art decal was the one that won our hearts. I honestly wouldn't know how to implement the decal in my home, but the picture of the bathroom (pictured above) gave me some slick ideas.

The 15.5 inches x 22 inches design retails for $28.00. And like everything Etsy, can be modified to your needs (colors and such).

Found via Etsy.