How to Determine Lingerie Size as a Teenager

Hey teens (and parents!), let’s talk about something way too many of us get wrong: how to actually measure your lingerie size. Spoiler alert — most off-the-rack bras don’t fit right, and that’s not your fault. Your body is changing, and standard sizing? Yeah, it’s kind of broken.

I’ve helped hundreds of teens in my years as a teen-fit consultant, and here’s the truth: finding your real bra size starts with two numbers — band and cup — but it’s not just about busting out a tape measure once.

Step 1: Measure Your Band
Wrap the tape snugly around your ribcage, just under your bust. Don’t suck in! Breathe normally. If it’s an odd number, round up to the nearest even. Why? Because bands come in even sizes only.

Step 2: Measure Your Bust
Loosen the tape and wrap it over the fullest part of your chest. Keep it parallel to the floor.

Step 3: Calculate Your Cup
Subtract your band from your bust measurement. Each inch equals one cup size. For example: 3 inches = C cup.

Still confused? Here’s a quick-reference chart:

Now, here’s what brands won’t tell you: sizing varies by brand. A 34C at Brand X might feel like a 32D at Brand Y. That’s why I always recommend starting with adjustable styles — think T-shirt bras or soft cups — during growth spurts.

Also, signs of a bad fit? Red marks, spillage, or straps digging in. If your bra rides up, go down a band and up a cup. Seriously — a 32D fits similarly to a 34C, just with more support.

And remember, teen bra sizing isn’t set in stone. Check every 6 months, especially if you’re growing fast. Growth typically slows after 16–18, but everyone’s different.

Pro tip: Try on bras later in the day when breasts are naturally fuller. And skip padded styles until you know your true size — padding lies!

In short: measure right, adjust often, and don’t trust labels blindly. Your comfort and confidence start with a proper fit.