Recycled Maternity Bra Sizing: Find Your Perfect Fit
By Sustainable Underwear Australia | Published: 2026-10-18
Category: Buying Guides
Learn how to measure and choose the right recycled maternity bra size for pregnancy, nursing, and beyond with our step-by-step guide.
Quick answer
Measure your band and bust while wearing a non-padded bra, then use the difference to find your cup size. For a recycled maternity bra, prioritize comfort and room to grow—size up if between sizes.
Why sizing matters more during pregnancy
Your body changes continuously during pregnancy and breastfeeding, so a bra that fits early on may not fit later. A well-fitted maternity bra reduces discomfort, supports breast tissue, and makes nursing easier.
Recycled maternity bras are designed to adapt, but they still need the right starting size. The 4-in-1 design (pregnancy, feeding, regular, and sports) only works well if the band and cups fit correctly.
Trade-offs: comfort vs. support
Non-wire bras, like the recycled maternity bra, offer all-day comfort and are safe to sleep in, but they provide less lift than underwired options. If you need more support for larger busts, consider a bra with a wider band and adjustable straps.
Because the recycled maternity bra converts to a racerback, you can get extra support during light activity. For high-impact exercise, a dedicated sports bra may still be better.
Step-by-step sizing guide
- Measure your band: Wrap a measuring tape snugly around your ribcage, just under your bust. Keep the tape level and breathe normally. Round to the nearest whole number. If the number is even, add 4 inches; if odd, add 5. This is your band size. Check that the tape is not too tight—you should be able to slip a finger underneath.
- Measure your bust: Wrap the tape around the fullest part of your bust, keeping it parallel to the floor. Do not compress your breasts. Round to the nearest whole number. Wear a non-padded bra or no bra for the most accurate measurement.
- Calculate your cup size: Subtract your band size from your bust measurement. Each inch of difference equals one cup size: 1 inch = A, 2 = B, 3 = C, and so on. For example, a 3-inch difference means a C cup. If the difference is exactly half an inch, round up to the next cup size for comfort.
- Try the bra with room to grow: During pregnancy, your breasts can increase by a full cup size or more. Choose a bra that fits on the loosest hook when you buy it, so you can tighten as your ribcage expands. The cups should not spill over or gap. If you are between sizes, size up—a slightly larger band is safer than one that digs in.
- Check the fit in every mode: Because the recycled maternity bra converts to a racerback and drop-cup nursing style, test all configurations. The band should stay level, the straps should not slip, and the drop cup should open and close easily with one hand. If the bra feels tight in racerback mode, adjust the clips or consider a larger band size.
Recycled maternity bras we recommend
- Recycled Maternity Bra - Cranberry: This 4-in-1 bra works for pregnancy, feeding, regular wear, and as a sports bra with racerback clips. One well-fitted bra covers multiple stages, so you save money and reduce waste.
Recycled Maternity Bra - Cranberry - Recycled Maternity Bra - Atlantis: The Atlantis colorway offers the same 4-in-1 design with a non-wire, sleep-friendly fit. If you prefer a specific shade, you can still get the same comfort and versatility.
Recycled Maternity Bra - Atlantis - Recycled Maternity Bra - Nude 3: Nude 3 is a neutral option that works under light-colored clothing. A neutral tone makes the bra less visible, which is handy for everyday wear.
Once you have your measurements, re-check your size every trimester and after birth, as your body changes. A properly fitted recycled maternity bra will support you through pregnancy and nursing while reducing waste.
