What happens to a very hungry caterpillar? Why, she turns in to a beautiful butterfly! I came up with the idea for this costume after giggling at my six month old in her sleep sack. She sleeps in these 'wearable blankets.' Basically a sack with armholes and a zipper up the front. We joke that she looks like a glow worm. I decided that she needed to be a caterpillar for Halloween. When else can I dress her up in a bunting costume like this? Never. She'll be mobile soon enough. Anyway, after thinking about the caterpillar costume for a while I decided she needed to be a caterpillar that turns in to a butterfly. Even better. So I set about figuring out how to make her costume convertible.
First thing I did was make a paper pattern. I traced one of her sleep sacks. Just one pattern piece. The back is cut on the fold, front pieces I added seam allowance for a zipper. Then I drew out the pattern pieces for the wings. I just used my pattern piece for the bunting for size comparison. I added an extension to the wings to allow them to be stitched to the back of the bunting.