I’m short and ordered a dress with a scalloped lace design at the bottom and I’m guessing they did thus. They measured me when I ordered my dress in the height heels I wanted to wear and made the dress to that length and called it hollow to hem. Then when the dress came it didn’t need to be hemmed. And this was not a pricey dress from Kleinfelds so I’m guessing that’s pretty standard on certain dresses. It made alterations cheaper because it didn’t need to be hemmed.