If possible, go to a physical store and bring your dress with you. Even with the correct measurements, there is no guarantee that the petticoat will look right.
When you are taking your measurements, it is most convenient to do in front of a full-length mirror. Your dress form must be adjusted to your measurements in costume. If you don’t have a dress form, get a friend to help you take the measurements. Leave the corset and shoes on.
If you don’t have a dress form, put all of your underpinnings on. Have your friend ready to take measurements. Have your dress handy as well. You will need it to determine the final length of your petticoat.
For a basic petticoat, without anything underneath, measure from the waist down to 2 to 5 inches (5. 08 to 12. 7 centimeters) above the dress’s hem. [7] X Research source
The front and side panels should each be a quarter of your waist measurement. The back panel needs to be half of your waist back to accommodate gathering. Add seam allowances to each panel. In most cases, this will be ½ inch (1. 27-centimeters).
