A UK 28H bra size means your underbust is roughly 23–24 inches (58–61 cm) and your full bust is around 36–37 inches (91–94 cm). That’s a 12‑inch difference — a deeply projected shape on a tiny band. A 28H contains a similar total volume to a 34G or 32GG, but the weight is anchored on a much narrower frame. The right 28H bra will grip your ribcage tightly, provide immediate depth and forward lift, and take the entire load off your shoulders. It is a specialist size that absolutely requires UK‑engineered full‑bust bras.
28H at a Glance
| Attribute | Detail |
|---|---|
| Band Size | 28 inches (underbust 23–24″ / 58–61 cm) |
| Full Bust Measurement | 36–37 inches (91–94 cm) |
| Cup Difference | ~12 inches (~30.5 cm) — UK H cup |
| Sister Sizes (UK) | 26HH (tighter band) · 30GG (looser band) |
| Likely US Equivalent | 28K (check brand chart) |
| EU Size | 60K |
| AU / NZ Size | 6H |
| S/M/L Equivalent | Petite full‑bust support only |
| Cup Volume Equivalent | Similar to 26HH and 30GG |
What Is a 28H Bra Size?
28H is a UK bra size that sits near the upper end of the “small band / full cup” spectrum. The underbust is a mere 23–24 inches, while the bust projects 12 inches forward. In absolute volume, this is similar to a 30GG, 32G, or 34FF — sizes that are considered genuinely full‑bust but still manageable with expertly engineered bras. However, on a 28 band, the support demands are magnified because the base is so narrow. This size typically belongs to a very slim person with a naturally high bust‑to‑ribcage ratio.
The 28 band must be exceptionally rigid. At H cup depth, the bust weight is enough that any band looseness causes immediate pain. A proper 28 band will feel almost corset‑like on the loosest hook; it should barely be possible to pull it more than an inch from your spine. If you’ve been wearing a 30GG or 32G, you’ve likely been compensating for a loose band by overtightening straps — and you know the deep red grooves that result. A true 28H band transfers the weight to your ribcage, where it belongs, and your shoulders will feel the difference within minutes.
The H cup is serious about depth. With 12 inches of forward projection, the cups cannot be shallow. They must have a deep, reinforced lower panel that allows the breast to sit naturally and rise upward from the wire, not push the wire down. Seamed cups — particularly balconettes, side‑support full cups, and stretch‑lace plunges from UK brands like Panache, Freya, Cleo, Bravissimo, and Curvy Kate — are non‑negotiable. Moulded foam bras, with very few exceptions, fail catastrophically at this size because they lack the immediate depth at the underwire, causing the whole bra to collapse, wrinkle, and push tissue toward the armpits.
Many who measure 28H have been hiding in 32FF or 34F, always feeling unsupported and self‑conscious. Discovering their true 28H can be an emotional moment — suddenly the bust is lifted, centered, and the back pain vanishes. The bra becomes a tool of freedom, not a source of suffering.
28H Bra Measurements
These numbers are your starting point. Each body is unique, and breast shape can influence whether you need to size up or down slightly in certain brands. Measure to the nearest half‑inch, and when in doubt, try both your calculated size and one cup up.
12‑inch difference = UK H cup
Wrap the tape around your ribcage, breathing out, and pull it to the firmness of a supportive band. For 28H, the measurement is almost always 23–24 inches. If you measure 25 inches or above, a 30 band may be necessary.
Place the tape over the widest part of your bust, typically across the nipples. Do not press into the tissue. The measurement for 28H is typically 36–37 inches. If one side is larger, use that measurement.
Subtract the underbust from the bust. Every inch equals one cup letter. 12 inches = H in UK sizing. If the difference is 11 inches, try 28GG; 13 inches, try 28HH.
Put on the 28H bra on the loosest hooks. Scoop all tissue from the sides and back into the cups. The band must sit horizontally and not ride up; the gore must tack against your sternum; the cups must be completely filled without any spillage or gaping. If the band shifts, try 26HH. If the cups cut in at the top, try 28HH.
What Does 28H Look Like?
A 28H bust is strikingly full on a delicate frame. The breasts are noticeably projected, with a defined lower crease and a rounded top section when properly supported. On a slim body, this creates a dramatic hourglass silhouette that many people embrace. From the front, the bust looks centered and balanced rather than wide, provided the bra has adequate side support. The visual effect of a well‑fitted 28H is one of lift and proportion — the breasts sit high on the chest, appearing both prominent and compact. In poor‑fitting bras, this size can look heavy and wide, but the right bra transforms it entirely.
Ultra‑Support Full Cup — Deepest Projection & Firm Band
- Four‑part cup construction with deep lower panel
- Power‑mesh side slings lock tissue forward
- Extra‑wide padded straps for comfort under weight
- Stretch‑lace top section to prevent cutting in
Seamed Balconette Bra — Forward Lift & Centering
- Vertical seams project tissue forward for a narrow front view
- Open neckline avoids cutting into upper fullness
- Reinforced lower cup prevents wire slippage
- Excellent for full‑on‑top or even shapes
Narrow Frame, Full Bust
28H on a tiny frame looks curvaceous and striking. The band must be extremely tight to handle the projection without movement.
Super‑firm 28 bandV‑Shaped Torso
A 28 underbust can coexist with a strong upper body. A racerback or J‑hook keeps the straps from slipping during movement.
Racerback convertibleSofter, Heavier Tissue
Deep lower‑cup projection is essential. A side‑support full cup prevents tissue from sinking and folding at the wire.
Seamed full cupRound & Firm
Can wear balconettes, half cups, and some projected moulded bras. Always verify immediate depth at the wire.
Seamed balconetteIs 28H Considered Very Large?
On a 28 band, an H cup is a notably full size, but the absolute volume is still moderate compared to what the high‑street calls “large.” It’s the same volume as a 30GG, 32G, 34FF, or 36F. The difference is entirely in the band tightness and the projection required. Society calls anything above a D “big,” but that’s because most people are in bands that are too big. A 28H on a correctly fitted body looks lifted and proportionate, not cartoonishly large. It is a real size, and it can be supported beautifully.
28H is a full‑bust size that can feel completely weightless with the right bra. The key is a band that stays absolutely horizontal and cups that project forward without squashing. Your body is not too large; the bra industry just isn’t designed for small ribcages.
If the band feels unbearably tight, first check the cup fit (a too‑small cup can artificially tighten the band). Then try a 30GG. But keep in mind that a 30 band on a 23–24 inch underbust will always be a compromise on support.
28H Sister Sizes
Sister sizes allow you to tweak the band while maintaining cup volume. For 28H, the tighter sister is 26HH (down a band, up a cup), and the looser sister is 30GG (up a band, down a cup). Remember that wire width can change across sister sizes — a 30GG may have slightly wider wires than a 28H in the same model.
Rule: Up one band → Down one cup (28H → 30GG) | Rule: Down one band → Up one cup (28H → 26HH) | Result: Cup volume stays very similar.
| Smaller Band | Reference Size | Larger Band |
|---|---|---|
| 26HH | 28H — You | 30GG |
| 24J | 28H | 32G |
28H vs Other Sizes
These comparisons resolve the most frequent sizing dilemmas for the 28H bracket.
- One cup larger than 28GG
- 12″ vs 11″ difference
- Fixes spillage, quad boob, and floating gore of 28GG
- Same band, less depth
- Good if 28H cups wrinkle or feel too roomy
- One cup smaller than 28HH
- 12″ difference
- Correct if cups are smoothly filled with no overflow
- Same band, more depth (13″ difference)
- Try if 28H still causes spillage or wire pressure on tissue
- Firmer, more supportive band
- Designed for a true 23–24″ underbust
- Provides maximum lift and stability
- Sister size — same cup volume
- Looser band; only if 28 band is truly painful even with correct cup depth
- Standard 28 band
- Comfortable starting point
- Tighter sister size
- Same cup volume
- Use only if 28 band still rides up or feels loose
Best Bra Styles for 28H
At 28H, your bra wardrobe is almost exclusively comprised of UK full‑bust brands that engineer for projection. Panache, Cleo by Panache, Freya, Bravissimo, Curvy Kate, and Ewa Michalak (Polish) are your primary sources. Seamed full cups, balconettes, and side‑support styles are essential. A very select few moulded bras may work, but only if they are specifically designed for deep cups (e.g., Panache Cari, Freya Deco in some batches).
Maximum coverage, deep lower projection, side panels, and stretch lace for shape adaptability. The workhorse of your drawer.
Creates a rounded, lifted silhouette. Works well for even and full‑on‑top shapes. Check wire width.
A deep plunge with stretch lace (like Panache Ana) can fit 28H if the wires follow your root. Not for soft tissue.
Panache Sport (wired) in 28H. No ordinary sports bra will contain this projection. Invest in two.
A single‑piece foam cup cannot hold 12 inches of projection. It will gap at the top and flatten at the bottom.
Wireless bras at this size provide negligible lift and separation. Reserve for sleeping or very light lounging.
Common Fit Problems with 28H
The band is failing. At H cup weight, a slack band transfers the entire load to your shoulders.
The cup is too small or too closed. Your tissue is pushing the bra away from your body.
The cup lacks immediate projection. The breast pushes the bra down, causing the wire to dig into your ribs.
The wires are too narrow, or the cup is too small. Side breast tissue is spilling over.
International Size Conversion for 28H
UK 28H is typically equivalent to a US 28K, but US brands are notoriously unreliable at this cup depth. Many US brands skip letters, so a 28K in one brand might be a 28J in another. European size is 60K; Australian is 6H. The safest method is to count the number of cup sizes from D. A UK 28H is 7 cups above D (D‑DD‑E‑F‑FF‑G‑GG‑H). Match that count in the brand’s chart.
For cross‑border shopping, rely on the Global Bra Size Converter. It eliminates the guesswork.
Living in 28H: Care and Longevity Tips
Your bras are precision garments. Treat them accordingly, and they will serve you well. Neglect them, and you’ll feel the consequences quickly.
Rotate at least three daily bras. Elastics need 24 hours to recover. Wearing the same 28H bra two days in a row weakens the band rapidly. Invest in multiple quality bras and cycle through them.
Hand‑wash in cool water. Heat, machine agitation, and harsh detergents destroy spandex. Soak in a delicate wash, squeeze gently, rinse, and roll in a towel to absorb excess water. Dry flat, never in the dryer. The cups are heavy when wet, so dry them horizontally to avoid strap stretching.
Inspect underwire casings monthly. At 28H, the wires bear significant load. If you feel a wire poking through, retire the bra immediately — don’t sew it up; the structural integrity is gone. Replace bras every 6–9 months with daily wear, or sooner if the band no longer grips firmly on the loosest hook.
Listen to your body. If your bras suddenly feel tight or loose, remeasure. Weight changes, hormonal shifts, and simple aging can alter your size by a full cup or band. Don’t stay in a size that hurts; your body is telling you something.
Frequently Asked Questions
Generally a US 28K, but you must verify the brand’s specific cup letter progression. Always count up from D.
An underbust of about 23–24 inches and a full bust of about 36–37 inches — a 12‑inch difference.
It’s rare in physical stores but not on bodies. Many people who need 28H are wearing 32FF or 34F and suffering. Online specialist retailers carry it.
UK sister sizes are 26HH (tighter) and 30GG (looser). They have similar cup volume on different bands.
Choose 28H if the cups are full and smooth. Choose 28HH if you have spillage, a floating gore, or wires pressing on tissue.
Online at Brastop, Bare Necessities, Figleaves, Amazon, and directly from UK brands like Panache, Freya, Cleo, and Bravissimo. Search “28H bra.”
Lock In Your True 28H Size
Measure accurately to determine if 28H, 26HH, 30GG, or a nearby size gives you the ultimate comfort and support.
