Rather buy your bras online? Don’t wing it; there are cool tools that can help you get the right fit. Take a quick quiz on TrueAndCo.com and you’ll receive free bras in the mail to try on at home; only pay for the ones you keep. And the ThirdLove app uses two selfies (snapped with your shirt on!) to figure out your size; then you can purchase bras from their site that are guaranteed to fit.