hollow to hem?

What does 'hollow to hem' mean?

I'm a dunce - sorry!

it means they measure you before ordering your dress from your chin area to the floor so that the length of your dress dosnt need to be taken up. I recommend it if you are short and have detail at the hemline of your dress. HTH

*BTW you need to have your shoes before they do this. You have to pay extra for it but it prevents and problems later if you have a detailed hemline

The 'hollow' is the indentation in the middle of your throat between your collarbones. Hem is to the floor, remember to get this measurement while wearing your day of shoes!!! Don't try and do this yourself have someone else measure you and always look straight ahead while being measured

Here is the definition of HTH from NetBride. Scroll down. Some manufacturers will not do custom cutting on certain dresses, so the HTH is not always necessary.