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Size 30H Bikinis

The 30H size sits at an extreme end of the sizing spectrum — a small, firm band paired with a very full H cup. You won't find this in standard retail anywhere, which means you've likely spent years choosing between bikinis that don't fit. A true 30H bikini top is custom-engineered for your exact proportions: a band that stays put without riding, and cups with the depth, projection, and careful seaming that only a specialized maker understands. When your bikini actually matches your real measurements, you discover what genuine support and comfort in swimwear actually feels like.

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Save $18.25Panache Olivia Full Cup Bikini Top SW1722 Green Gingham Front
Panache
Panache Olivia Full Cup Bikini Top SW1722 - Green Gingham Sale price$54.75 Regular price$73.00
Save $39.50Panache Bette Balcony Bikini Top SW1842B Seersucker Front
Panache
Panache Bette Balcony Bikini Top SW1842B - Seersucker Sale price$39.50 Regular price$79.00
Save $19.00Panache Bette Balcony Bikini Top SW1842C Posy Print Front
Panache
Panache Bette Balcony Bikini Top SW1842C - Posy Print Sale price$57.00 Regular price$76.00
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Panache Jennifer Plunge Bikini Top SW2024B Aurora Black White Front
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Panache Jennifer Plunge Bikini Top SW2024B - Aurora Black/White Sale price$78.00
Save $17.50Panache Ella Twist Bandeau Bikini Top SW1763 English Rose Print Front
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Panache Ella Twist Bandeau Bikini Top SW1763B - English Rose Sale price$52.50 Regular price$70.00

Common Fit Mistakes at Size 30H

The biggest mistake at 30H is sizing up in the band to find enough cup depth. A 32H or 34H will give you loose band fit that rides up and drifts, shifting the entire cup position and creating spillage at the sides — the opposite of what you're trying to fix. Stay true to 30H and prioritize brands that understand smaller band, fuller cup combinations. Another critical error is choosing bikini tops without underwire or internal structure; at 30H, fabric alone cannot support your cup weight, and you'll lose shape and coverage in the water. Finally, avoid strapless or minimal-support styles at this size. Full-cup designs with reinforced construction are non-negotiable — not a luxury, but a necessity for actual support.

Cup-Sized Bikinis, Curated by Fit Experts

At The Bra Diva, we carry bikinis the same way 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 ability to hold up in and out of the water. 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.

Shopping for more styles in size 30H? Browse our Size 30H Swimwear collection, or shop Size 30H Bras for everyday lingerie in your size.

Not sure if 30H is your correct size? Use our bikini size chart →