Definitely buy a white dress now. You might even have problems finding one at this point!! But definitely leave the tags on, keep the receipt, and make certain it is exchangeable.

Oh, and not everyone internet shops or CAN internet shop - I know I'm between sizes right now and wouldn't even attempt to buy a basic turtleneck online.

now a days, girls can usually get away with a solid white cardigan, either short or long sleeved and even a white shrug to cover their shoulders if their white dress has straps or is strapless.

you might be able to find something at white house/black market if there is one in your town.

I haven't read this entire thread so if someone has already said this, please forgive me.

My sister got her dress for initiation at David's Bridal for a little over a hundred dollars. And, consider it an investment because a lot of women's organizations wear white for ritual after initiation.