Use a plain onesie that is a size too big
Remove the sleeves
Remove the stitching from around the neck
Use lacey or frilly trim. You can sew it on but to
save time you can use fabric glue.
Keep glue away from babies; do not let them wear the romper until glue has dried and romper has been washed.
Cut the trim and start gluing from
the bottom and work your way up
When you are finished the back let glue dry for 30 minutes before flipping over and doing the front
Glue trim all the way up to the arm holes
Use trim as straps and
cut away excess fabric from back of onesie
Let dry 24 hours before washing and allowing baby to wear.
Using glue will limit onesie's ability to stretch so it is important to use a onesie that is a size too big for the baby.