My cousin asked me to add a tutu to a onesie that she has bought for her daughter’s first birthday. I wanted to share how I did it with you in case anyone would like to see.
Cut a piece of elastic (you choose your size, just don’t use elastic that is too wide) that is the same width around as the onesie. If you know the child’s exact waist measurement, you could cut it to be waist measurement – 1 inch.
Sew the piece of elastic together. You will then sew it on the onesie in four places: the side seams, the front middle, and front back middle.
Use a zig zag stitch.
Now, the tutu will stay in place no matter how much moving or pulling on it she does!