Humpback Whales swim on a deep blue background on this batik from the Totally Tropical Artisan Batiks collection designed by Lunn Studios for Robert Kaufman Fabrics. The largest dolphins are about 5.25 inches long. All batiks are hand dyed. The colors vary even within a bolt of fabric. Because of the nature of the hand-dying process, batiks often bleed or run. Therefore, if you may wash your completed project, we recommend you pre-wash batiks, preferably with something that helps fix" or lock in the colors. Commercial treatments are available. Many people use white vinegar.