Button hoops are necessary for when you don't want to insert a zipper on a dress. I always thought it was just a design until I saw it was really just functional. It creates enough space for the head to pass through the dress and you button it up. I decided to go with a button hoop for the back of this baby dress and here's how I made it.
First, I cut a piece of the fabric 2 by 1 inch
Next, I folded the fabric at the middle
I folded again into two
I then sewed along the edge of the folded part to close the open edge
After sewing, I folded into two and crossed one end on to the other securing with a stitch
I made an opening on the dress for where the hoop is meant to be and then sewed it in place
That's about it! I don't have a button now but the button is meant to be on the left side of the neckline and go through the hoop
It's my first post in the community, thanks for reading!