My sister started calling my niece “hippo” after she gained 15 pounds since I last saw her. I had some hippo fabric and offered to make a dress for her.
I cut out a front and back after using a onesie as a guideline. I also used measurements to make sure. Then pinned them together.
I planned on having two ties that surround and tie together in the front. Therefore, one tie has to go through the fabric. I made a simple hole by folding and sewing at the side seam. Here it is threaded through.
Then it was just connect the ties and turn over the edges.
Here is the front followed by back.
I suppose it could be reversible, too…