If you know you will be the same size at the party as you are when buying the dress, then pay the extra $30 to have the dress made to your measurements.
i ordered this for My daughter's party. She loves the dress!!!! It is exactly how she pictured it!!! We do have to get one minor adjustment made as the top is a little big, but we ordered the using the size instead of special made to order. In all we are very saisified!