Seamless Maternity Bra Sizing Guide

Navigating the changes your body goes through during pregnancy and postpartum can be a journey, and finding the right bra is a key part of that comfort. Our Seamless Maternity Bra is designed with that journey in mind, offering flexibility and support through every stage.

Your Questions Answered

I need help with the Seamless Maternity Bra size. My usual bra size is 10C but my breasts have grown during pregnancy.

I think I am closer to a D cup now, maybe DD. My band size seems the same though.

Will it still fit when I start breastfeeding? I hear breasts get even bigger then.

How It Fits

The Seamless Maternity Bra is engineered for adaptability. Its primary feature is its ultra-stretchy, seamless construction. This means it doesn't have rigid cups or bands that dig in. Instead, the fabric conforms to your body's natural curves and changes. It provides a comfortable, gentle hold without constricting, making it ideal for sensitive skin and fluctuating sizes.

The fit is designed to be snug but not tight, offering support without the pressure of an underwire. The stretchiness allows it to expand significantly, accommodating growth during pregnancy and the potential for increased size due to milk supply during breastfeeding. The band provides a comfortable anchor that remains in place without riding up, even as your body changes.

Size Recommendations

To help you find your best fit, we've outlined the sizing for the Seamless Maternity Bra based on common measurements and the needs of pregnant and nursing individuals.

Recommended Size: Medium

Band Size Accommodation: 10-12

Cup Size Accommodation: C - DD

Considerations:

Pregnancy: As your breasts grow, the generous stretch of the Medium size is designed to comfortably house cup sizes ranging from C to DD, even if your band size remains relatively stable in the 10-12 range.
Postpartum & Nursing: This bra is specifically designed to support you through nursing. Engorgement and fluctuating milk supply are common, and the highly elastic fabric is built to expand and contract with these changes. Many mothers find that the size they chose for later pregnancy continues to work well through their nursing period.

Common Fit Issues & How to Avoid Them

While the Seamless Maternity Bra is designed for flexibility, here are a few points to consider to ensure the best fit:

Band Too Loose/Tight: If your band size is consistently outside the 10-12 range, the Medium might feel too loose or too snug. The band is designed to be supportive, so a significant deviation could compromise this.
Cup Volume Overwhelmed: If your breasts are significantly larger than a DD cup, the 'Medium' size's capacity might be exceeded. While the fabric stretches, there's a limit to how much volume it can comfortably contain without losing support.
Individual Shape: Breast shape and distribution can vary greatly. While the seamless design is forgiving, very specific shaping needs might require a more structured bra. This bra prioritizes comfort and adaptability over a highly sculpted shape.

Between Sizes: What to Do?

For the Seamless Maternity Bra, if you find yourself on the cusp between cup sizes (e.g., hovering between a D and a DD, or a DD and a slightly larger size) within the recommended band size, we generally suggest:

If leaning towards the larger cup size (DD or slightly more): Opt for the Medium. Its expansive stretch is intended to accommodate these changes comfortably. The key is that your band size should still fall within the 10-12 range.
If your band size is consistently larger than a 12: This bra, in the Medium size, may not provide adequate support or the correct fit around your ribcage.
If your cup size is significantly beyond DD: While the fabric offers substantial stretch, going beyond a DD cup size might mean the bra is fully extended, potentially impacting its long-term comfort and support.

The intention of this bra is to grow with you. The elasticity of the fabric means it's very forgiving. If your band size is a comfortable 10-12, the Medium is almost always the right choice to accommodate significant cup size increases common during pregnancy and postpartum.

Last updated: December 2025 • Based on real customer conversations