Breast Augmentation Visualiser

Clinical 3D estimate. Volumes from published reference data; shape and gravity are modelled, not measured. Drag to rotate, pinch/scroll to zoom.

Starting bra size (UK)

Natural volume / breast

Underbust

Implant

Volume per breast

SALINE EXPANDER AUTO-FILL

Start (cc)

End (cc)

Fill (cc)

Fills each expander step by step from start to end.

Profile

Shape

Placement

Implant type

Shell base diameter

Shell projection

Body measurements

Height

Shoulder width (biacromial)

Waist circumference

Hip circumference

Breast spacing (midline to medial edge)

Breast position (IMF height)

Arm angle from the body

Arms forward / back

Elbow bend

Skin elasticity

Skin tone

Clothing

Bra under tops

Gravity & posture

Apply gravity

The torso stays upright on screen so shapes can be compared; only the direction gravity acts in changes.

Gravity direction: 0° standing → 90° lying on back

Result (per breast)

Natural tissue

Implant

Total target volume

Volume measured from 3D mesh

Estimated new size (by volume)

Tape bust / cup by measurement

Weight

Projection from chest wall

Base width

Nipple drop from gravity

Sternal notch to nipple

Display

Mesh quality

X-ray: see-through skin showing the implant, pectoral muscle and ribs

Rendering

Method & references

Natural volume: sister-size cup volume table compiled by Bay Area Esthetics Plastic Surgery (90cc at 28AA/26A rising to 3000cc), indexed by band and bust–underbust difference in inches. UK cups map 1 inch per letter (A=1″ … LL=18″). Values are interpolated in cube-root space; beyond the table (above 3000cc) they are extrapolated on the same cube-root trend and flagged. Source
Variation: cup volume differs significantly between bra manufacturers, with SD from ≈31cc (A) to ≈123cc (DD) (Moscarelli et al., PRS Global Open 2025). Source
Implant dimensions: diameter and projection derived from V = k·D²·P fitted to Mentor MemoryGel catalogue data (e.g. 200cc high profile: 9.7cm × 4.0cm; 200cc moderate plus: 10.5cm × 3.2cm; 215cc moderate: 11.6cm × 2.8cm). Ultra-high ratio is approximate. Source
Rule of thumb check: surgical series report ≈135–138cc per cup size increase. Source
Commercial range: cosmetic round implants run from ≈100cc to just over 800cc; Mentor's MemoryGel Enhance reconstruction range reaches 1445cc. Anything larger is shown for visualisation only. Source
Above 1450cc: modelled as overfilled saline expanders. Overfilled saline shells become ball-shaped, lose width and gain projection (source); ex-vivo expander overfill to 400% kept base dimensions nearly stable up to +50% fill, then grew all dimensions with projection fastest (Treiser et al., PRS GO 2016). Largest US saline implant 800cc, recommended max fill ≈960cc (Eppley).
Breast shape: one envelope model for every size. A natural breast is a soft rounded mass on its chest-wall base, tapering onto the chest at a shallow angle except at the inframammary fold, and drooping under gravity in proportion to its weight and skin laxity. An implant smaller than the natural breast sits behind the tissue and enlarges the natural shape; once it exceeds the natural volume the shell sets the shape and the natural tissue is spread as an even layer over it.
Arms: full mannequin arms, posable at the shoulder (out and forward/back) and elbow, with a deltoid cap blended into the shoulder slope. If the breasts would pass through an arm, it is swung back and/or out by the least amount that clears them, allowing ~1.5 cm of soft-tissue contact where the arm rests against the side of the breast.
Realistic rendering and Photo: optional studio lighting, ambient occlusion, a subsurface-scattering skin shader, anatomical surface detail (collarbones, neck cords, costal margin, flank ribs, fold crease), elastic pressure and see-through lace. Photo averages many jittered frames for an anti-aliased still with soft area-light shadows. None of this changes the volumes or shape model.
Implant shape: round shells as above; anatomical (teardrop) shells are modelled on full-height styles, which are about as tall as they are wide with somewhat less projection (Natrelle 410 FM: 205–670 cc, 11–16 cm high, 3.8–5.6 cm projection; FDA labelling), with a straight-sloped upper pole and fullness carried low. Expanders above 1450 cc are always round.
Bra: styled on a three-part full-cup lace underwire bra: lined lower cups with a vertical seam, an unlined stretch-lace top section with a scalloped edge, centred ~2 cm straps, a tall gore and ~10 cm wings into a hook-and-eye back (Bratabase).
Clothing: loose garments are draped as a height-field over the body: each horizontal loop spans the convex hull (bridging the cleavage), the cloth hangs below the bust at the fabric's drape slope, and above the bust it is pulled taut to the shoulders. The underwire bra has moulded cups, wire channels, centre gore, wings and band; its straps are taut ribbons from the top of the cup over the shoulder to the back band, so they stand off the chest as the bust grows.
Geometry: the breast surface is a displacement of a parametric torso. Its amplitude is solved exactly (cubic in amplitude) so the enclosed mesh volume equals the target; the "measured" figure is recomputed from the final triangles.
Gravity: sag scales with mass (tissue ≈0.95 g/cc, silicone gel ≈0.97 g/cc), skin elasticity and implant fraction/placement support, applied as a mass-weighted drift along the gravity vector, so ptosis, lower-pole fill and fold overhang emerge from the model.

Not a substitute for surgical assessment (tissue pinch, skin stretch, chest wall asymmetry).