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I wear a 38a so I ordered the Rosme Womens Balconette Bra in 38a and when it arrived it was way too tight. I returned it and I re-ordered in 40a and it is not much better. I am going to keep them (I ordered black and ivory) because they are very pretty. I am fit and slender but the band is so tight even on the loosest setting that it looks like I have "wings". Not very appealing.