Style 3954 strapless that offers a lower almost Balconnette coverage. This lower coverage could be why you are spilling over the top of the cup. You may need to go up a cup size to an F cup to insure a better fit.
Babette from San Clemente, CA, USA
Sublime style 3954 strapless is a plunge which may affect the coverage or depth of cup in the bra. we would suggest trying Pure 3612
Memory foam convertible style.
Honeycutt from Iowa
The cup sizing does vary by brand and country. In the US market a DD and an E cup are the same and a DDD is equal to an F cup.
In brands from the UK an E is equal to a US DDD. If you have been buying a UK brand in a size E you would need a DDD or F cup in most US and European brands other than the UK.
Jennifer from Ridge, NY USA