24/7® Classic T-Shirt Bra, Black - Thirdlove - Nylon/Spandex,modelGGG 24/7® Classic T-Shirt Bra, Black - Thirdlove - Nylon/Spandex,modelGGG 24/7® Classic T-Shirt Bra, Black - Thirdlove - Nylon/Spandex,modelGGG 24/7® Classic T-Shirt Bra, Black - Thirdlove - Nylon/Spandex,modelGGG 24/7® Classic T-Shirt Bra 24/7® Classic T-Shirt Bra 24/7® Classic T-Shirt Bra, Black - Thirdlove - Nylon/Spandex
24/7® Classic T-Shirt Bra, Black - Thirdlove - Nylon/Spandex,modelGGG

Need help with sizing? Take the Fit Quiz

24/7® Classic T-Shirt Bra, Black - Thirdlove - Nylon/Spandex,modelGGG 24/7® Classic T-Shirt Bra, Black - Thirdlove - Nylon/Spandex,modelGGG 24/7® Classic T-Shirt Bra, Black - Thirdlove - Nylon/Spandex,modelGGG 24/7® Classic T-Shirt Bra, Black - Thirdlove - Nylon/Spandex,modelGGG 24/7® Classic T-Shirt Bra 24/7® Classic T-Shirt Bra, Black - Thirdlove - Nylon/Spandex

24/7® Classic T-Shirt Bra

$65

62,520 Reviews

Rated 4.5 out of 5 stars from 62,520 reviews

24/7® Classic T-Shirt Bra

$65

62,520 Reviews

Rated 4.5 out of 5 stars from 62,520 reviews

Band

Size guide

Cup

Size

Size guide
Product Details

The 24/7® Classic T-Shirt Bra gives you full coverage and a smooth line that disappears under fitted tops and tees. It's our #1 bra for a reason: the memory-foam contour cups shape to you and stay invisible under clothes all day. Slip it on in the morning and forget you're wearing it.


  • Memory-foam contour cups: mold to your shape for a smooth, rounded look under clothes.

  • Underwire support: lifts and holds you from morning to night.

  • Nylon/Spandex fabric: soft and stretchy, so it moves with you.

  • Seamless, smooth edges: no show-through under tees or fitted tops.

  • Full coverage: keeps you comfortable and secure through a full day.

  • Wide fit range: AA–H cups, including half cups, with bands 30–48.


Wear it under fitted tops, tees, and everyday outfits from your morning meeting through the night. It's built for all-day comfort, so you're covered wherever the day takes you.
Size & Fit
  • True to size
  • Moderate (demi) coverage
  • Not sure about your size? This t-shirt bra comes in AA–H cups, including half cups, with bands 30–48, so you can get closer to your true fit instead of settling. Whether you want more lift or fuller coverage, take the Fit Quiz or use Find My Fit to dial it in.
Bra Size Calculator & Chart

Thirdlove offers over 60 bra sizes from 32 to 44 band and bra cup sizes from AA to H cup, including our exclusive half cup sizes. Using your current bra size as a starting point, you can refer to the bra cup size chart below to refine your fit.

Bra Size Calculator & Chart

How To Use The Bra Size Chart

When using the chart to find your bra size, keep in mind:

  • The band size increases as you move from left to right. Move left or right within the row if your band doesn't fit.
  • The cup size increases as you move from top to bottom on the chart. Move up or down the columns if your cups don't fit. In between cup sizes? Go up or down a half-cup! And keep in mind if you want styles that are full coverage or not!
  • Bra sizes that share a row are sister sizes, meaning they share the same cup volume (though they have different cup letters). For example, at a glance they’re all just different bra sizes. However, the row with bra sizes 36C, 38B, and 40A have something in common: they all have the same cup volume but have different band sizes. The same goes for the row with bra sizes 38H, 40G, 42F, 44E, 46D, and 48C.
Bra Size Calculator & Chart

Measure snugly around your rib cage (underbust) and around the fullest part of your bust, in inches. Step 1 gives your band. For step 2, subtract your underbust from your bust and find the difference in your band's column. These are the sizes our Bra Size Calculator gives.

Step 1: Band size by underbust measurement (inches). Each range excludes its lower value and includes its upper value.
Underbust (in) Band size
24.9 – 28.5 30
28.5 – 30.5 32
30.5 – 32.5 34
32.5 – 34.5 36
34.5 – 36.5 38
36.5 – 38.5 40
38.5 – 40.5 42
40.5 – 42.5 44
Step 2: Bra size by band and by bust minus underbust (inches). Each range excludes its lower value and includes its upper value.
Bust − underbust (in) Band 30 Band 32 Band 34 Band 36 Band 38 Band 40 Band 42 Band 44
Up to 2.534AA
2.5 – 330B*32A*34AA*
3 – 3.530C32B34A
3.5 – 430C½32B½34A½
4 – 4.530D32C34B36A*
4.5 – 530D32C½34B½36A½
5 – 5.530E32D34C36B38A*
5.5 – 630E½32D½34C½36B½38A½
6 – 6.530F32E34D36C38B
6.5 – 730F32E½34D½36C½38B½
7 – 830G32F34E36D38C40B*
8 – 932G34F36E38D40C42B*
9 – 1034G36F38E40D42C44B*
10 – 1134H36G38F40E42D44C
11 – 1236H38G40F42E44D
12 – 1338H40G42F44E

* Also the result when the difference is exactly 2.5 in: 30B, 32A, 34AA; 4 in: 36A; 5 in: 38A; 7 in: 40B; 8 in: 42B; 9 in: 44B.

The calculator only gives a size for an underbust over 24.9 in, up to 42.5 in, with a difference of up to 13 in. Blank cells and measurements outside these ranges have no size in the calculator.

Bra Size Calculator & Chart
Fabric & Care
  • 76% nylon/24% Spandex
  • Machine wash in cold, lay flat to dry
  • Use a lingerie bag for machine wash
Shipping & Returns

Perfect fit promise: Exchanges free for 60 days for all eligible orders. Please try on the bra to ensure a good fit, making sure to leave the original tags attached. We only accept underwear in unworn condition, with original tags, in its unopened original polybag. Items marked final sale are not eligible for return or exchange. If something’s not right, we can help. Our Fit Experts are available via live chat, or email to answer any questions you might have.

Complete the Look

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What Our Customers Are Saying

  1. Maureen W.

    Rated 5 out of 5 stars

    Thirdlove has solved a tremendous

    Thirdlove has solved a tremendous gap in bra coverage — literally and figuratively — by being the only bra company I know of to offer half sizes. My B-and-a-half bra is absolutely perfect, providing the right amount of coverage without the gaping I usually experience with bras once all that breast tissue I arranged perfectly slides back into its most comfortable position. This is life changing — and I love the ribbed straps even if their function is more performative than successful.

    Cup Size
    B 1/2
    Fit
    True to size
    Comfort
    Excellent

  2. Jennifer R.

    Rated 5 out of 5 stars

    A girl’s best friend

    This bra is a classic and tried and true for a reason
    I can’t say enough good things about it
    It’s supportive but doesn’t give the max coverage so you can show a little cleavage if you want when wearing a V neck T shirt for example. I love how many colors it comes in too. No boring taupe and that’s it in this style, fun and funky colors make bra shopping fun

    Comfort
    Good

  3. Kristin G.

    Rated 5 out of 5 stars

    Best bra ever!

    This is by far the best bra I have ever purchased. The fit is always perfect and the feel is silky goodness without the heat! This is a fantastic color too! My bra of choice for years to come!

    Cup Size
    D 1/2
    Fit
    True to size
    Comfort
    Excellent

  4. Angela

    Rated 5 out of 5 stars

    BEST bra!

    I've been wearing this style for YEARS and absolutely love it and highly recommend it. Unfortunately though, the size that fits me best has been out of stock for some time now, and I really hope they are restocked soon.

    Cup Size
    G
    Fit
    True to size
    Comfort
    Excellent

  5. Elizabeth W.

    Rated 4 out of 5 stars

    Comfortable, but . . .

    I love the look, feel, and fit of this bra, but the straps are long and slip out of adjustment. I’m very petite, and while I can get the straps short enough, I cannot get them to stay there. It’s a problem I’ve had with other Third Love bras.

    Cup Size
    C
    Fit
    True to size
    Comfort
    Excellent

FAQs

What is a t-shirt bra?

A t-shirt bra is a smooth, seamless bra built to disappear under fitted tops and tees. The 24/7® Classic uses memory-foam contour cups that mold to your shape for a rounded, natural look with no show-through. You get full coverage and all-day comfort in one everyday style.

What's the difference between a regular bra and a t-shirt bra?

The difference is the smooth finish. A t-shirt bra has seamless cups and flat edges made to stay invisible under clothes, while many regular bras have seams, lace, or textures that can show through. This one pairs that smooth line with underwire support and memory-foam contour cups.

Why are they called t-shirt bras?

They're called t-shirt bras because they're made to look invisible under a thin, fitted t-shirt. The smooth, seamless cups and edges keep your top looking clean, with no lines or texture peeking through. That's exactly what the 24/7® Classic is built to do.

Who makes the best t-shirt bras?

The best t-shirt bra is the one that actually fits you. Thirdlove's 24/7® Classic is our #1 bra with 62,411 reviews, offered in AA–H cups with half cups and bands 30–48 so more people can find their fit. Take the Fit Quiz or use Find My Fit to see if it's right for you.

Is it good for everyday wear?

Yes. The 24/7® Classic is built for everyday, all-day comfort, with memory-foam contour cups and underwire support that hold up from morning to night. Wear it under work tops, tees, and weekend outfits without adjusting all day.

What sizes does it come in?

The 24/7® Classic comes in AA–H cups, including half cups, with bands 30–48. Half cups help if you fall between sizes and want a closer fit. Not sure where you land? Take the Fit Quiz or chat with a fit stylist.

What's it made of, and how do I care for it?

It's made from a Nylon/Spandex blend with memory-foam contour cups for stretch, shape, and a smooth finish. To help it keep that shape, hand wash and lay it flat to dry. Skip the dryer to protect the cups and elastic.

What if the fit isn't right?

You get free exchanges for 60 days through our Perfect Fit Promise, so you can swap sizes if it's not quite right. If you're between sizes or unsure, start with the Fit Quiz or Find My Fit before you order. You can also chat with a fit stylist for help.