For the ladybug body, create a simple harness out of black fleece. Measure your dog around the chest, halfway down the back, and also around the waist. Cut the black fleece into a modified H shape, with the arms of the H matching your dog's chest and waist measurements plus 2" (the arms should be about 2-1/2" wide). The center of the H should be about 8" wide and the length of half your dog's back. For example, on a medium dog, this harness has straps that measure 23" end to end and a center panel measuring 8" wide by 9" long.
Create the ladybug wings by drawing a wing shape that is 3" wide at the base, 5-1/2" wide at the widest point and 12" long (as shown). Modify the size up or down for a smaller or larger dog. Cut out one wing and lay it upside down on another section of felt, then use it as a guide to cut the other wing.
Cut small holes in the center of the elastic and thread the ends of the pipe cleaner through. You can make the antennae more stable by adding a little hot glue to the underside of the pipe cleaner. Glue the pompoms to the ends of the pipe cleaner and the antennae are done.