Size 40JJ Bras

A 40 band with JJ cup is the deepest fuller-bust size on the widest band we carry, offering maximum stability and comfort. The 40 band's width offers excellent support, so you can focus on cup engineering and construction. Look for bras with high-gauge wires, multi-seamed cups for lift and projection, and band construction that won't migrate. At this size, you need construction designed specifically for JJ depth.

Size 40JJ Bras Sized to Actually Fit

A 40 band with JJ cup depth demands bras engineered specifically for that cup volume and height on the widest band we carry. The 40 band's width offers exceptional all-day comfort and stability, which means you can focus on finding the right cup structure. The cups need multiple seams per side (typically three or four) to provide both lift and projection without spillage. Wire gauge matters significantly here; undersized wires will flex under load and fail to support the cup weight. Look for reinforced side seaming from underwire to apex, deep cups with proper projection, and band construction that measures true to size. Strap placement is critical because it directly affects how the cups sit and how weight distributes across your shoulders. The wider band reduces shoulder strain significantly, which is especially important at JJ cup volume. Full-cup and minimizer designs built specifically for this depth work much better than balconettes or half cups.

Fuller Bust Bras, Curated by Fit Experts

At The Bra Diva, we carry bras by actual bra size, not just by small, medium, or large. Every style in this collection is selected for its construction quality, true-to-size fit, and all-day wearability. Our team has been fitting customers since 1987 at our Cherry Hill, NJ boutique, and we bring that same expertise to every size we carry online.

Explore bras in similar sizes: 40HH | 40K | 38JJ

Also available in swimwear: Size 40JJ Swimwear

Not sure if 40JJ is your correct size? Use our bra size chart →