for a rod/dowel will work at the top.
Design http://www.spoonflower.com/designs/2569642 is for 2015. I can redo the contest design for 2015 by request if you prefer it. Designed for the 54 inch linen cotton. It will not work right on narrower fabric. The stitching for casing would come through the chickens and the casing would be about 3/4 of an inch wide. Directions: Turn 1/4 inch on all sides and press (so the sides and bottom edges come to the black borders). Then turn the sides and bottom again along the edge of the border and press. Stitch in the black border. The top turned edge should be folded down along the black border and stitched across the black strip below the small chickens. Set as a centered design for a 30 inch decal there will be a blank border all around. If you want it as a 15 inch decal message me.