Dear Mom, I think EDMWDM is right, a tea-length dress would also be appropriate and maybe more flattering. Be sure your dress emphasises your waist to create an hour-glass figure. I went on Nordstrom's website and found a style of dress you might want to consider. It is a sheath dress with an a-line skirt, giving you fullness at the hem. It has a chiffon jacket with 3/4 sleeves that is belted, creating a waistline. Also, take into account the color of her bridesmaids dresses. You don't have to match exactly. Let's say her colors are pastel, you may want to choose a different but complimentary pastel. The point is not to match but to blend. Good luck!