Ultra Boost Inserts
Ultra Boost Inserts Sizing Guide
If you are unsure of your bra size, please measure your bust and contact us with the measurements.
BRA SIZE
| UK | BOOMBA BRA SIZE |
|---|---|
| 28A | AA |
| 30A | AA |
| 32A | AA |
| 34A | A |
| 36A | B |
| 38A | C |
| 40A | D |
| 42A | E |
| 44A | F |
| 28B | AA |
| 30B | AA |
| 32B | A |
| 34B | B |
| 36B | C |
| 38B | D |
| 40B | E |
| 42B | F |
| 28C | AA |
| 30C | A |
| 32C | B |
| 34C | C |
| 36C | D |
| 38C | E |
| 40C | F |
BRA SIZE
| UK | BOOMBA BRA SIZE |
|---|---|
| 28D | A |
| 30D | B |
| 32D | C |
| 34D | D |
| 36D | E |
| 38D | F |
| 28DD | B |
| 30DD | C |
| 32DD | D |
| 34DD | E |
| 36DD | F |
| 28E | C |
| 30E | D |
| 32E | E |
| 34E | F |
| 28F | D |
| 30F | E |
| 32F | F |
| 28FF | E |
| 30FF | F |
| 28G | F |
Tip: For the perfect fit, we recommend choosing your true size. Only size down if you are in between sizes.
For sizes 34F and up, our Demi Boost Inserts (double push-up) are available in sizes up to 34G and our Invisible Lift Inserts (lightly padded) are available in sizes up to 34M.
Please note that results may vary depending on breast size and shape. Results will be similar to a double push up bra. BOOMBA’s padded inserts work best with natural breasts.
If you need any help with sizing or insert styles, please feel free to contact us for further assistance, we'd love to hear from you!
Still need assistance? Send us your bust and underbust measurements and we'll help you find your perfect fit!
UK Customers: No taxes & import duties
BOOMBA's most padded insert style. The go-to for that wow factor. Instantly boost up to 2 cup sizes. Recommended for tops with structure in the chest area.
For the perfect fit, we recommend choosing your true size. Only size down if you are in between sizes.
 | Triangular-shaped, best for low v-cut tops |
 | Boosts up to 2 cup sizes |
 | Double-sided adhesive for extra security |
 | Sweat and water-resistant |
 | No sewing required and interchangeable between outfits |
 | Our inserts are not intended for individuals who have sensitive or thin skin, or women who are pregnant or breastfeeding |
Unlike a sticky bra that is supported by the adhesive, BOOMBA inserts are supported by the clothing and cannot stay up by themselves. It is crucial to wear them in tight, structured, and fitted tops.
For the perfect fit, we recommend choosing your true size. Only size down if you are in between sizes.
Have augmented breasts? Please check our FAQ section to see if they are suitable for you.
HOW TO USE BOOMBA INSERTS
Please note that our inserts are not intended for individuals who have sensitive or thin skin or women who are pregnant or breastfeeding.
Like traditional inserts, BOOMBA inserts need to be used inside clothing. They cannot be used by themselves.
STEP 1
Wear the garment on your body. Tighten the garment if possible for best results.
STEP 2
Stick the inserts onto the inside of your clothing item and not to your skin.
STEP 3
Scoop breasts up and towards the centre to create cleavage.
STEP 4
While scooping, press the insert onto the breasts and press firmly to secure.
STEP 5
Make sure both sides are even in the mirror, adjust if needed.
Check out this blog to know which insert is suitable for your outfit.
SIZING
If you are unsure of your bra size, please measure your bust and contact us with the measurements.
Ultra Boost Inserts:
BRA SIZE
| UK | BOOMBA BRA SIZE |
|---|---|
| 28A | AA |
| 30A | AA |
| 32A | AA |
| 34A | A |
| 36A | B |
| 38A | C |
| 40A | D |
| 42A | E |
| 44A | F |
| 28B | AA |
| 30B | AA |
| 32B | A |
| 34B | B |
| 36B | C |
| 38B | D |
| 40B | E |
| 42B | F |
| 28C | AA |
| 30C | A |
| 32C | B |
| 34C | C |
| 36C | D |
| 38C | E |
| 40C | F |
| 28D | A |
| 30D | B |
| 32D | C |
| 34D | D |
| 36D | E |
| 38D | F |
| 28DD | B |
| 30DD | C |
| 32DD | D |
| 34DD | E |
| 36DD | F |
| 28E | C |
| 30E | D |
| 32E | E |
| 34E | F |
| 28F | D |
| 30F | E |
| 32F | F |
| 28FF | E |
| 30FF | F |
| 28G | F |
Tip: always size down if you're in between sizes for a seamless fit.
For sizes 34F and up, our Demi Boost Inserts (double push-up) are available in sizes up to 34G and our Invisible Lift Insertsa (lightly padded) are available in sizes up to 34I.
Please note that results may vary depending on breast size and shape. Results will be similar to a double push up bra. BOOMBA’s padded inserts work best with natural breasts.
If you need any help with sizing or insert styles, please feel free to contact us for further assistance, we'd love to hear from you!
SHIPPING
Limited time only, FREE shipping on orders £30+ GBP for:
Australia, US (excluding Alaska and Hawaii), Singapore, UK, Canada, Hong Kong, Austria, Belgium, Czechia, Denmark, Estonia, France, Germany, Hungary, Ireland, Japan, Lithuania, Luxembourg, Macao, Malaysia, Netherlands, New Zealand, Philippines, Poland, Portugal, Spain, Slovakia, Sweden, Thailand, and Vietnam.
Free Shipping on orders £60.00+ for the rest of the world, otherwise £7.99 shipping fee applies.
Express shipping (3-7 business days) available everywhere for £22.
Please find the average transit time below:
Region | Average Shipping Time |
North America |
|
| United States | 4-12 |
| Canada | 6-11 |
| Mexico | 5-12 |
Oceania |
|
| Australia | 5-12 |
| New Zealand | 8-10 |
| Asia | |
| Hong Kong | 3-7 |
| Singapore | 3-7 |
| Malaysia | 3-7 |
| Thailand | 3-7 |
| Philippines | 3-7 |
| Rest of Asia | 5-15 |
| Europe | |
| UK | 4-10 |
| Germany | 4-10 |
| EU | 10-15 |
| Switzerland | 6-10 |
| Austria | 7-11 |
| Rest of Europe | 10-15 |
| Rest of the world | 10-25 |
Real Girls, Real Results
Loved By Everyone
How To Use
Why Choose BOOMBA?
BOOMBA products are created by women for women. That’s why our products fit and feel better, because we have also experienced the same struggles you have right now.
We create our products using the best materials and really put care and thought behind the design to ensure a seamless and comfortable fit. When you wear BOOMBA’s products, you will definitely feel and see the difference a good bra makes.
Our products may not be the cheapest, but you can bet that our products will outlast the competitors. Many sticky bra alternatives are priced lower, but you can also only get a few uses out of them. Ours are created using the highest quality materials so that they will actually last, creating less waste in the long run. All our products are also manufactured in a safe and clean working environment that pays fair wages to their employees. We are proud to support fair trade and want to thank you for also doing the same.
Together we can make a difference.
Which BOOMBA Inserts is best for you?
Demi Boost Inserts
The Demi Boost inserts add up to TWO cup sizes, instantly giving you that gorgeous cleavage. They stay hidden in tops that feature sweetheart necklines.
Hollywood’s #1 Best Kept Secret
“The best-selling inserts that are breaking the internet.”
Customers Who Bought This Item Also Bought
United StatesObsessed!!!
I have tried SOOOO many sticky bras and have hated all of them! I saw ads for these inserts and finally caved. I bought the Ultra Boost and Demi Boost. I wasn’t sure if they were going to work on me because I have very small boobs but these worked wonders! All of my low cut tops fit so much better now and the double sided stick is amazing. Do not walk, RUN to buy these!!!
United StatesWedding day and beyond
My boobs have never looked this good, and it works so perfectly with my wedding dress
United StatesAMAZING!!!
So i bought these to wear with my wedding dress. I went for my first fitting and i was so wowed and amazed how great these worked!! Easy to apply. Customer service is on point you tell them your bra size and they will tell you the cup size to buy which was a plus for me. Definitely purchase you won’t regret it.
United StatesLove the diversity!
Just bought my first pair of Boombas and am super excited to try it. Have not yet received it, but I just wanted to applaud the amount of shades and sizes that are offered. You don't often see sticky bras with these many shades and I am here for it.
United StatesMay need a new pair soon..
I love these inserts and they are my holy grail. I originally bought it in December for my wedding in August and ended up wearing it all the time under my outfits that they probably won't last till my wedding lol. For others that are wondering, I bought these to my fitting and it made my dress feel so secure and really gave me a more balanced silhouette which I appreciated. This is really the perfect wedding bra I have been looking for since all the other ones on the market had clasps in the middle and would probably fall off if I started sweating.
