I'm getting married next August, and one of my BMs will be TTC next summer. She's waiting until March or so to start that so she won't be too preggers to fly to the wedding (she lives in NJ, we're getting married here in Seattle). Which is great, except I'm guessing we'll want to order BM dresses by then and we'll have no idea how pregnant she'll be in August. So, I have a couple of questions: -If I'm getting married at the end of August, when do I need to order BM dresses by? I'm thinking beginning of March at the absolute latest, since it'll be prime season and all. -Where's the line between "bigger sized regular dress" and "maternity dress"? She'll be 0-5 months pregnant at the wedding, and it seems like most of my friends started moving into maternity clothing around the 4-5 month mark. Any thoughts? I've had several competing ideas, ranging from "let her decide what to order and deal with the consequences of that decision " to "order a maternity dress for her and cover the cost of that, just in case she needs it."