I would go with the larger size Ingunn. Linen is comprised of long fibers found in the stalk of the flax plant. These fibers are quite stiff. Once they bend, they stay bent, and the result is linen's trademark wrinkles. Linen shirts and pants can be machine-washed in a gentle cycle in warm water, or preferably, hand-washed or dry-cleaned. Repeated hand or machine washings make linen soft, eventually reducing the wrinkles, while dry cleaning keeps it crisp and new-looking. Once you're done hand- or machine-washing, air-dry the linen garment. It's in linen's best interest to never see the inside of a dryer. Ideally, you should let the garment air-dry. If you're ironing linen, do so on a high setting, while the garment is still damp. The dampness guards against burning the linen; the fabric dries quite fast. Iron first on the inside of the garment to remove wrinkles, and then on the outside to create a nice sheen.
I personally hand wash all my linen clothes except for my blazer. Sorry this is so long. Enjoy your dress!
