modest. since parents are no longer teaching their daughters what this means, you will have to listen to this grandmother. this is a sacrament not a prom, and certainly not a fashion show, or trolling for guys. a dress to the knees or slightly below, cut properly in your actual dress size, and from a fabric that is not sheer and does not cling. sleeves any length but the shoulders must be covered. no cleavage. proper foundation garments, which do not reveal their color or style to the casual observer. shoes, closed toes, with stockings or pantihose. you should be able to walk in them without wobbling, shuffling, sliding, or clacking down the aisle like Hans Brinker in his wooden shoes.