Weddings: Getting Kate Middleton's Style Dress - as part of the Wedding series by GeoBeats. To re-create Kate Middleton's gown or any Royal Wedding gown, there are some rules. You cannot show cleavage, so you need to start with a strapless gown underneath that is high enough not to show any cleavage. Also you arms and your shoulders should be covered. You can do that with lace or here we have an embroidered beading pattern. We have placed it over the gown and that gives us a covered look that can be worn in any cathedral. You also need to have an extended train. I believe her train was 12 or 14 feet long. This is not quiet as long but it is important to have the long train, the covered arms and shoulders and no cleavage for any Royal Wedding gown.