A UK 28GG bra size indicates an underbust of about 23–24 inches (58–61 cm) and a full bust of about 35–36 inches (89–91 cm). That’s an 11‑inch difference — a notably projected shape on the smallest standard band. A 28GG is comparable in total volume to a 34F or 32FF, meaning it’s moderate overall but demands deep, supportive cups and a band that does not shift. The right 28GG bra lifts from a very firm base, centers the tissue, and eliminates shoulder strain.
28GG at a Glance
| Attribute | Detail |
|---|---|
| Band Size | 28 inches (underbust 23–24″ / 58–61 cm) |
| Full Bust Measurement | 35–36 inches (89–91 cm) |
| Cup Difference | ~11 inches (~27.9 cm) — UK GG cup |
| Sister Sizes (UK) | 26H (tighter band) · 30G (looser band) |
| Likely US Equivalent | 28J (check brand chart) |
| EU Size | 60J |
| AU / NZ Size | 6GG |
| S/M/L Equivalent | Petite specialized support |
| Cup Volume Equivalent | Similar to 26H and 30G |
What Is a 28GG Bra Size?
28GG is a UK size that pairs an ultra-narrow 28 band with a GG cup, representing an 11‑inch difference between bust and ribcage. In the UK cup sequence (A, B, C, D, DD, E, F, FF, G, GG), this is the 10th cup size — solidly into the “full‑bust on a small band” category. But again, volume is relative: a 28GG holds far less tissue than a 36GG, for example. This size is often seen on naturally curvy, petite women with a slim ribcage and a noticeably full bust.
The 28 band is the anchor that cannot fail. With an 11‑inch projection, any looseness in the band immediately sends weight to the shoulders. A true 28 band will feel firm on the loosest hook — almost like a tight hug. If you’ve been wearing a 30G or 32FF, you’ve likely been compensating for a band that rides up by overtightening straps, resulting in deep grooves and neck pain. A 28GG band, when new, should not shift more than an inch when you pull it away from your back.
The GG cup requires serious depth and lift. The cups must be deep at the wire and forward‑projecting, not shallow and wide. Multi‑part seamed cups are essential; they direct tissue forward and up, preventing the dreaded “east‑west” spread and bottom‑heavy sagging. Moulded foam cups rarely have the immediate projection needed at this size and will typically collapse or push the breast down, causing underwire displacement and discomfort. UK specialist brands engineer their GG cups with power‑mesh wings, reinforced lower panels, and side slings precisely for this reason.
If you measure as 28GG, trust the numbers. Many in this size range have been mis‑sized into larger bands with smaller cups (like 32F or 34DD) and feel that something is always off — the straps slip, the band rides, the cups gape or cut in. A correct 28GG bra resolves all of those issues at once.
28GG Bra Measurements
Take these measurements with a soft tape measure, directly on bare skin. Stand sideways to a mirror if possible, and keep the tape parallel to the floor. For the underbust, pull it tight; for the bust, let it just touch.
11‑inch difference = UK GG cup
Wrap the tape directly under your breasts, around the ribcage. Exhale and pull the tape as tight as you want a supportive band to feel. For 28GG, this is typically 23–24 inches. If you measure 25 inches or more, a 30 band might be more appropriate.
Place the tape over the fullest part of your breasts, usually across the nipples. Don’t compress; the tape should just rest against the skin. For 28GG, the reading is generally 35–36 inches.
Subtract the underbust from the full bust. Each inch equals one cup letter in the UK system. 11 inches = GG. If your difference is 10 inches, you’re a 28G; if 12 inches, you’re a 28H.
Fasten the bra on the loosest set of hooks. Scoop all breast tissue from the sides into the cups. The band must stay parallel to the floor all around; the center gore must sit completely flat on your sternum; the cups must be entirely filled with no bulging or wrinkling. If the band shifts, try 26H; if the cups overflow, try 28H.
What Does 28GG Look Like?
A 28GG bust is unmistakably full on a very small frame. The breasts are round, projected, and sit high on the chest. From the side, there’s a clear, prominent curve. From the front, the bust looks balanced rather than overly wide, provided the bra has good side support. On a slim, petite body, a 28GG can create a striking hourglass silhouette, but the volume is still compact relative to larger band sizes. Many wearers find that once properly supported, their bust appears lifted and more contained, not larger.
Side‑Support Full Cup Bra — Deep Cups & Firm Band
- Reinforced lower cup for immediate 11‑inch projection
- Side slings bring tissue forward for a narrower front view
- Extra‑firm power‑mesh wings prevent band roll
- Stretch lace top accommodates asymmetry and movement
Seamed Balconette Bra — Forward Projection Without Bulk
- Multi‑part cup with deep lower panel prevents folding
- Vertical seams lift and center, creating a round silhouette
- Open neckline works under moderate V‑necks
- Excellent for bottom‑full or evenly‑full shapes
Narrow Figure, Curvy Bust
28GG on a tiny frame looks dramatically curvaceous. The band must be exceptionally tight to manage the projection without riding.
Super‑snug 28 bandDefined Upper Body
Even with a V‑shaped torso, the underbust is small. A racerback or J‑clip keeps straps in place during activity.
Convertible or racerbackBottom‑Heavy, Pendulous
Requires a deep, non‑stretchy lower cup to prevent sinking. A side‑support full cup is the safest daily choice.
Deep lower cupRound & Self‑Supporting
Can wear balconettes, half‑cups, and even some projected moulded bras. Check wire width carefully.
Seamed balconetteIs 28GG Considered Very Full?
On a 28 band, yes — it’s a full‑bust size with significant projection. But the absolute breast volume is still moderate (similar to a 34F). The difference is concentration: all that volume is on a tiny torso, so it can look more prominent than the same cup letter on a larger band. That said, a 28GG is a normal, healthy size that thousands of women wear comfortably every day with the right bra. The stigma around large cup letters comes from poor fitting, not reality.
28GG is a naturally full shape on a tiny ribcage — not an anomaly. The right bra distributes weight across your back and lifts the bust off your torso, making you feel lighter and more comfortable than any larger band size ever could.
If the cups feel too shallow or snug, move to 28H. If the band is painful, check the cup size first, then consider a 30G sister size with an extender.
28GG Sister Sizes
Sister sizes let you adjust the band while keeping the cup volume constant. For 28GG, the tighter sister is 26H (down a band, up a cup), and the looser sister is 30G (up a band, down a cup). Be aware that wire width and cup depth can shift subtly between sister sizes, so always try on a specific bra before committing to a new size.
Rule: Up one band → Down one cup (28GG → 30G) | Rule: Down one band → Up one cup (28GG → 26H) | Result: Cup volume remains very similar.
| Smaller Band | Reference Size | Larger Band |
|---|---|---|
| 26H | 28GG — You | 30G |
| 24HH | 28GG | 32FF |
28GG vs Other Sizes
These direct comparisons clear up the most common fit questions at this size.
- One cup larger than 28G
- 11″ vs 10″ difference
- Fixes spillage, quad boob, and floating gore of 28G
- Same band, less depth
- Good if 28GG cups wrinkle or feel too deep
- One cup smaller than 28H
- 11″ difference
- Correct if cups are completely filled without overflow
- Same band, more depth (12″ difference)
- Try if 28GG still causes spillage or wire presses on tissue
- Firmer, more supportive band
- Designed for a true 23–24″ underbust
- Provides maximum anchorage for the GG cup
- Sister size — same cup volume
- Looser band; use only if 28 feels excruciatingly tight despite correct cup fit
- Standard 28 band
- Comfortable reference point
- Tighter sister size
- Same cup volume
- Use only if 28 band still rides up or feels too loose
Best Bra Styles for 28GG
At 28GG, your bra drawer should consist almost entirely of seamed, multi‑part cups from specialist UK brands (Panache, Cleo, Freya, Curvy Kate, Bravissimo). These companies engineer their GG cups with the depth, wire width, and band power required. A few projected moulded bras exist (e.g., Freya Deco, Panache Cari) but always test them for immediate projection at the wire.
Maximum coverage, deep lower cup, and side slings. Keeps everything lifted and centered for 12+ hours.
Rounded, forward profile. Excellent for bottom‑full and even shapes. Open neckline works under most clothes.
A deep plunge with stretch lace (like Panache Ana) can fit beautifully if the wires are wide enough.
Panache Sport or Freya Active in 28GG. Wired encapsulation is the only safe option for high impact.
A seamless foam dome will flatten and collapse, forcing tissue sideways and down.
Wireless bras rarely have the lift and separation needed for an 11‑inch projection on a small band.
Common Fit Problems with 28GG
The band is too loose. At GG volume, a slack band throws all the weight onto your shoulders.
Cup is likely too small or too shallow. The breast pushes the bra away from the body.
The cup lacks enough lower depth. The breast forces the bra downward, causing the wire to press.
Either wires are too narrow or the cup is too small. Tissue escapes into the armpit.
International Size Conversion for 28GG
UK 28GG is a distinct size. US brands often label it as 28J, but some call it 28I or even 28K. European size is 60J; Australian is 6GG. Always count from D: UK 28GG is 6 cups above D (D‑DD‑E‑F‑FF‑G‑GG). Match that count in the brand’s cup sequence.
To avoid costly returns, always buy UK‑sized bras in UK sizing. Use the Global Bra Size Converter if you must order from a non‑UK brand.
Frequently Asked Questions
Generally a US 28J, but check the brand chart. US lettering skips and merges inconsistently.
Underbust about 23–24 inches, full bust about 35–36 inches — an 11‑inch difference.
It’s full‑bust on a small band, but the total volume is moderate (similar to 34F). It looks curvy, not massive.
UK sister sizes are 26H (tighter) and 30G (looser). Both keep cup volume nearly identical.
Choose 28GG if 28G cups overflow, the gore floats, or wires press on tissue. Choose 28G if 28GG cups are wrinkly or empty.
Online at Brastop, Bare Necessities, Figleaves, Amazon, and direct from UK brands like Panache, Freya, Cleo, and Bravissimo. Search “28GG bra.”
Secure Your Ideal 28GG Fit
Enter your exact measurements to find out if 28GG, 26H, 30G, or a nearby size offers the ultimate support and comfort.
