I have a one hoop petticoat on sale. I bought it for my wedding dress but it is unused as in the end I had a smaller one for my wedding.
The petticoat has a small tear about 10 cm on the top part which has been repaired (see picture). For actual wearing it shouldn't matter as your petticoat is under your wedding dress. It will lift up your dress quite a lot even though there is just one hoop as it has two tulle layers (they are kind of middle stiffness - not too stiff but not soft as well).
You will have to steam it before you put it on on your wedding day to straighten the tulle layers.
It suppose to be universal size as it has lycra on the top part
(securing it in your waste and on the hips) but I would say it is up to size 14 max.
Look also at my other adverts for wedding dress, shoes and lovely flower girls headbands.