Free Next Day Delivery
Over 25k Happy Clients
Proudly Made In Uk
Your cart is empty
Continue shoppingThe 60-second fitting
Your bra label is probably lying to you — most women wear the same size for five years while their body changes around it. Six questions translate your label, your band feel and your dress problem into the sticky-insert size that will actually hold: strapless, braless, lifted — in a real size made for your cup, not one stretchy size squeezed onto everyone.
6 questions · about a minute · your full result, the True Size Guide and 10% off your first box wait at the end. The guide is also free to download below — it's built to be shared.
36DD → 32GG. That's how the average size moved in Boob or Bust's survey of 1,000 women once they were measured properly — years of wearing the wrong label, corrected in one fitting. Read the research ↗
No wrong answers, and no obligation — if your size still isn't certain at the end, the free 1-to-1 consult and free exchanges exist precisely for that.
It travels with every quiz result, and it's free to download right here too: The True Size Guide for G–O Cups: how to measure properly, how sister sizes work, how to translate a label size into a sticky size, and the prep-and-placement routine that decides whether any sticky bra is still holding at 9pm — or gave up at 7.
The inserts get their couple of glamorous hours out. The free Perfect Lift Sculpting Top (in the box, XS–6X) holds a heavy bust in place for the other twenty-two — sitting up, side-lying, sleeping — no bra, no inserts. The guide covers both modes.
The guide is a one-page download you can pass on — it's the format the big-bust and plus-size bridal groups actually welcome. Its last page routes readers back to this quiz.
Three patterns come up again and again in the fitting rooms of the big-bust world. The quiz is built to catch all three.
Most women wear the same size for five years — through kids, weight changes, life. Boob or Bust's 1,000-woman survey found the average size moved from 36DD to 32GG the moment women were measured properly. Your label isn't your size. It's your history.
Three women can all wear a 36H on the label and fit completely differently once the straps come off — one truly a G, one an H, one a K. That's why this system carries multiple close sizes per body type — 24 genuinely distinct sizes — instead of squeezing everyone into four or five stretchy ones.
"Sticky bra keeps falling off" is one of the highest-intent searches in this category — women mid-failure, ready to switch. Mainstream guides make it worse: Triumph's backless-dress guide flatly says adhesive bras "don't provide enough lift for larger cup sizes" and steers bigger busts elsewhere. The honest answer is prep, placement and the right size in a system — inserts plus the sculpting top to lock it in. Triumph's guide ↗
