The Seaside Top features proprietary CupUp™ booster technology, designed for small busts (AA-B cups). With adjustable straps and a snug fit, it enhances lift and creates a rounded, cleavage-forward silhouette. This bikini top stays secure without gaping, ensuring comfort and support for petite frames. Ideal for small-bust shoppers, it mimics the look of a push-up bra by adding up to 2 cup sizes of natural enhancement, making it a stylish choice for beach outings.
From the brand: Made for small busts (AA–B cups)
The Seaside Top is our signature
cleavage-enhancing triangle bikini top
designed exclusively for small busts. Featuring our proprietary
CupUp™ booster technology
, this style creates natural lift, centered definition, and the effortless “brought-together” shape the IBTC loves.
Unlike traditional swim padding, our lightweight silicone boosters are sewn in —
no shifting pads, no gaps, no inserts
, just sculpting that feels like
you… but boosted.
CupUp™ enhances the look of
up to 2 cup sizes
depending on your natural volume and rib cage shape.
How it fits
Runs
snug in the cups
(intentional — the snugness activates CupUp™ lift)
Adjustable straps + fixed band
Best for
AAA–B cups
, petite frames, and anyone wanting extra definition
If you’re between sizes →
size UP
Expect a
lifted, rounded, cleavage-forward
look
CupUp™ may feel slightly more structured when you hold it, but once on your body, it feels
lightweight, secure, and incredibly natural.
Who it’s perfect for
Petite chests looking for
natural cleavage
AA, A, and B cups wanting more shape without padding
Narrow rib cages needing a sculpted, supportive feel
Anyone who’s never found a triangle top that actually fits a small bust
Small-bust shoppers wanting a triangle top that
stays put
and doesn’t gape
Why small-bust shoppers love it
Creates lift
without gaping
Helps breasts sit
centered and rounder
Stays in place thanks to the snug, supportive CupUp™ design
Booster technology mimics the look of a subtle push-up bra
Designed so small chests don’t “slide around” in the cups
Adds up to
2 cup sizes
of natural-looking enhancement
Sizing Notes
XS:
AAA–A cups
S:
AA–A cups
M:
A–B cups
L:
B–C cups
If you are between S and M, choose:
M
for a softer, more relaxed feel
S
for more visible lift and cleavage
Model measurements:
Model
Size
Size on Model
XS
Height
5'7
Bust
30A
Waist
26"
Hips
34" (wears size small in classic bottoms)
