The 38K Bra: Expert Fit, Full Support & Confidence for Curvy Figures

The 38K bra size represents a unique intersection of a wider band and significantly fuller cup—often underserved in the lingerie industry despite growing demand. Women who wear a 38K deserve bras that prioritize comfort, structure, and style without compromise.

In this expert guide, we explore what a 38K bra size entails, why proper support matters, and how to shop confidently in a market that still lacks inclusivity for extended cup sizes.

What Does 38K Mean in Bra Sizing?

A 38K bra generally indicates:

• A 38-inch underbust measurement (ribcage circumference)

• A K-cup size, which typically reflects a 13-inch difference between the band and bust (in UK sizing; roughly an O-cup in US sizing)

This size is part of the full bust/full figure category and is designed to support substantial breast volume that requires superior engineering in lingerie construction.

Size Perspective:

A 38K bra is not simply a larger version of a D cup—it requires an entirely different design approach involving:

• Wide-set underwires

• Reinforced cup panels

• Strategic weight distribution

Common Challenges for 38K Wearers

1. Limited Retail Availability

Mainstream lingerie brands often top out at G or H cups, leaving K-cup wearers with few accessible options unless shopping with specialty retailers.

2. Structural Fatigue

Standard bras not built for K-cup breasts tend to collapse under the weight, leading to poor posture, shoulder indentation, and cup spillage.

3. Mis-sizing

Many women end up in the wrong bra size, opting for looser bands and smaller cups due to lack of stock—leading to discomfort and inadequate support.

Essential Bra Features for a 38K

When shopping for this size, supportive architecture is non-negotiable. Look for bras with:

Bra Styles That Work Well for 38K

• Full Cup Bras – Maximum support and coverage; ideal for everyday wear

• Minimizer Bras – Distribute breast volume more evenly to create a smoother silhouette

• Non-Padded Underwired Bras – Lightweight yet firm; preferred for large cup sizes

• Encapsulation Sports Bras – Prevent bounce with individual cup containment

• Soft Cup or Wire-Free (Specially Designed) – For relaxation or sensitive skin days

Best Brands That Offer 38K Bras

These brands specialize in full-bust and full-figure lingerie, including 38K and beyond:

• Elomi – Leading full-figure brand with wide size range and comfortable fits

• Goddess – Known for exceptional support in K+ cups with wide bands

• Panache – High-performance UK brand known for strong underwire design

• Bravissimo – Entirely dedicated to D-L cups with fashion-forward styles

• Sculptresse by Panache – Designed specifically for fuller figures

• PrimaDonna – Luxury-level craftsmanship with superior materials and fit

Tips for a Flawless Fit at 38K

1. Get Professionally Fitted: At least once a year or after significant weight changes

2. Don't Compromise Band Size: Avoid sizing up the band to find a bigger cup—it sacrifices support

3. Evaluate Your Bra After 6 Months: Bras stretch over time and may no longer give optimal lift

4. Try Different Styles: What works for full coverage may differ from your sports or leisure needs

5. Invest in Quality: At this cup size, cheap bras will likely not provide the necessary structure

Encouragement for the 38K Woman

Wearing a 38K bra doesn’t mean giving up on beautiful lingerie or personal comfort. You deserve bras that fit as beautifully as they function. While it may require more intention to find brands that support your size, your experience matters—and there is no need to settle for discomfort, style sacrifice, or invisibility in the market.

You’re not alone—and you’re absolutely not “too hard to fit.” With the right guidance and brands that understand the needs of full-bust women, the perfect bra is within reach.