Sorry at the moment this is the only tutorial I have to hem a dress. Do you know what fabric it is? The technique doesn’t change much for hemming. You would just need to do the fitting correctly depending on the fabric. Some fabrics stretch weird not allowing you to accurately cut or hem ( usually fabrics that are sheer like chiffon ) In this case if the dresses are floor length I would have the girls stand on a solid surface with the shoes they’ll be wearing and measure and mark the same height from the floor all around while they’re standing. do this instead of laying the dress out on the table and marking the amount that needs to be cut. The will give you an accurate fitting and even bottom. Again this really depends on the fabric. If it’s a simple fabric then the sides seems just need to be lined up just like in this dress and hemmed. Hope this is helpful.

I’m glad to hear that JoAnn 🙂