Double Cup Bra Sizes Explained – What DD, FF, GG & HH Mean
Double cup bra sizes such as DD, FF, GG and HH are part of the extended UK bra sizing system. They represent the same one-inch progression as every other cup size and simply provide additional sizing steps between single-letter cups.
The typical UK cup sequence is: D → DD → E → F → FF → G → GG → H → HH → J.
Bra cup sizes can be confusing, especially when double letters such as DD, FF, GG and HH appear in the sizing system. Many shoppers assume these sizes represent unusual or specialist measurements, but they are simply part of the standard UK bra size progression.
If you are unsure of your starting size, begin with our Bra Size Calculator and follow the measuring steps in our Bra Fitting Advice.
What Are Double Cup Bra Sizes?
Double cup sizes are additional steps within the UK bra sizing sequence. Each cup size represents a 1 inch increase in the difference between the underband measurement and the fullest bust measurement.
Rather than jumping directly between some cup letters, the UK system inserts additional steps using double letters such as FF, GG or HH.
This creates a more gradual size progression and improves the chances of finding a comfortable and accurate fit.
UK Bra Cup Size Order and Measurement Chart
UK bra cup sizes follow a structured progression where each step represents a 1 inch increase in the difference between the bra band size and the fullest bust measurement.
You can also see the full progression explained visually in our UK Bra Cup Size Chart, which shows how cup sizes increase as the difference between band size and bust measurement grows.
AA → A → B → C → D → DD → E → F → FF → G → GG → H → HH → J → JJ → K → KK → L → LL
| Difference Between Band Size and Bust | UK Cup Size |
|---|---|
| 0 inches | AA |
| 1 inch | A |
| 2 inches | B |
| 3 inches | C |
| 4 inches | D |
| 5 inches | DD |
| 6 inches | E |
| 7 inches | F |
| 8 inches | FF |
| 9 inches | G |
| 10 inches | GG |
| 11 inches | H |
| 12 inches | HH |
| 13 inches | J |
| 14 inches | JJ |
| 15 inches | K |
| 16 inches | KK |
| 17 inches | L |
| 18 inches | LL |
Cup Size Comparisons: FF vs G, GG vs H and More
Many shoppers compare neighbouring cup sizes when trying to understand the UK bra size progression. Each step represents a one-inch increase in the difference between the bra band size and the fullest bust measurement.
For example, moving from an FF cup to a G cup represents one step in the UK cup sequence, while sizes such as GG cups and HH cups continue the progression in the extended UK sizing system.
Because cup volume changes with band size, two bras with different band measurements can still have similar cup capacity. These relationships are known as bra sister sizes, which explain how equivalent sizes such as 32FF, 34F and 36E can fit similarly.
For a detailed comparison between these neighbouring sizes, see our guide explaining F vs FF vs G cup size differences.
Yes. FF comes after F in the UK cup size sequence.
Yes. The progression moves F → FF → G, meaning G is one cup size larger.
Yes. GG is the next cup size after G in the UK sizing system.
Yes. The sequence continues GG → H.
The difference between FF and G cups is one step in the UK cup progression, representing roughly a one-inch increase in bust measurement relative to the band size.
If you are curious about how large these sizes appear in real terms, you can also read our guide explaining how big GG cup sizes are and how they compare to neighbouring cup sizes.
What Cup Size Comes After FF, GG and HH?
Many shoppers want to know what cup size comes next in the UK bra sizing sequence. Each step represents roughly a one-inch increase in the difference between the bra band size and the fullest bust measurement.
In the UK bra size sequence, the cup after DD is E.
The next cup size after FF is G.
The cup size after GG is H.
In the UK system, the cup size after HH is J.
What Is a Double F, Double G or Double H Bra Size?
Some shoppers search for bra sizes using the word “double” rather than the letter format used on bra labels. For example, a double F bra usually refers to an FF cup in the UK sizing system.
Double F bra size → FF cup
Double G bra size → GG cup
Double H bra size → HH cup
These double-letter cups appear within the extended UK bra size sequence and represent the same one-inch progression as every other cup size.
Double Cups in UK vs US Bra Sizes
Most UK lingerie brands use the extended cup sequence with double letters such as FF, GG and HH. Some US brands follow a shorter progression which can cause confusion when comparing international sizes.
To compare these systems, see our UK vs US bra size comparison guide.
Popular Bra Sizes in Double Cup Ranges
If you wear a double cup size such as FF, GG or HH, you can explore guides for some of the most commonly searched band and cup combinations below.
Explore Individual Cup Guides
The guides below explain how each cup size fits within the UK bra sizing sequence, including band combinations, measurement examples and common bra styles available in each size.
Find Your Correct Bra Size
If you are unsure which cup size you need, start by measuring your bust and underband using our Bra Size Calculator.
You can then confirm your fit using our Bra Fitting Advice and compare sizes between brands with the Bra Size Converter.