Sizing information Ultra Boost Inserts

Size Index:  A  |  B  |  C  |  D  |  DD/E  |  DDD/F

Kindly take note that Ultra Boost Inserts come in different cup sizes and results may vary depending on breast size and shape. Results will be similar to a double push up bra. BOOMBA results work best with natural breasts.

Tip: always size down if you're in between sizes for a seamless fit.


If your current cup size is A

and your chest size is: Ultra Boost
US 32 | AU 10 | EU 70 | FR 85
size AA
US 34 | AU 12 | EU 75 | FR 90
size A
US 36 | AU 14 | EU 80 | FR 95
size B
US 38 | AU 16 | EU 85 | FR 100
size C
US 40 | AU 18 | EU 90 | FR 105
size D

If your current cup size is B

and your chest size is: Ultra Boost
US 32 | AU 10 | EU 70 | FR 85
size A
US 34 | AU 12 | EU 75 | FR 90
size B
US 36 | AU 14 | EU 80 | FR 95
size C
US 38 | AU 16 | EU 85 | FR 100
size D
US 40 | AU 18 | EU 90 | FR 105
size E

If your current cup size is C

and your chest size is: Ultra Boost
US 32 | AU 10 | EU 70 | FR 85
size B
US 34 | AU 12 | EU 75 | FR 90
size C
US 36 | AU 14 | EU 80 | FR 95
size D
US 38 | AU 16 | EU 85 | FR 100
size E
US 40 | AU 18 | EU 90 | FR 105
Not recommended

If your current cup size is D

and your chest size is: Ultra Boost
US 32 | AU 10 | EU 70 | FR 85
size C
US 34 | AU 12 | EU 75 | FR 90
size D
US 36 | AU 14 | EU 80 | FR 95
size E
US 38 | AU 16 | EU 85 | FR 100
Not recommended
US 40 | AU 18 | EU 90 | FR 105
Not recommended

If your current cup size is DD/E

and your chest size is: Ultra Boost
US 32 | AU 10 | EU 70 | FR 85
size D
US 34 | AU 12 | EU 75 | FR 90
size E
US 36 | AU 14 | EU 80 | FR 95
Not recommended
US 38 | AU 16 | EU 85 | FR 100
Not recommended
US 40 | AU 18 | EU 90 | FR 105
Not recommended

If your current cup size is DDD/F

and your chest size is: Ultra Boost
US 32 | AU 10 | EU 70 | FR 85
size E
US 34 | AU 12 | EU 75 | FR 90
Not recommended
US 36 | AU 14 | EU 80 | FR 95
Not recommended
US 38 | AU 16 | EU 85 | FR 100
Not recommended
US 40 | AU 18 | EU 90 | FR 105
Not recommended