What Size Breast Implants Should I Get? A Surgeon's Approach

There is no correct implant size in the abstract. There is only the size that fits your anatomy and delivers the result you want, and those two things have to be reconciled at consultation.

Why I do not start with cup size

Cup sizing is not standardised. A 32D in one brand is a 32DD in another, and bra sizing bears no fixed relationship to implant volume. If you tell me you want to be a D cup, I have learned almost nothing about what to put in.

What I need instead is a measurement and a description of the look you are after.

The measurements that set your range

• Base width. The horizontal dimension of your natural breast footprint. An implant wider than this will spill towards the armpit or the midline. This measurement, more than anything else, sets your maximum sensible volume.

• Soft-tissue cover. A pinch test at the upper pole tells me how much tissue is available to camouflage the implant edge. Thin cover pushes towards a lower profile implant or a partially submuscular position.

• Skin envelope quality. How much the skin will accommodate and how well it will recoil. Poor elasticity limits volume and raises the question of whether a lift is needed.

• Chest wall shape and existing asymmetry. Almost everyone is asymmetrical. Different volumes on each side are common and normal.

Profile and volume are not the same decision

Two implants of identical volume can look completely different. Profile describes how far an implant projects relative to its base width. A low profile implant is wide and flat; a high profile implant is narrow and projects forward.

A 300cc moderate profile implant on a broad chest wall reads as subtle. A 250cc high profile implant on a narrow chest wall reads as obviously augmented. Volume alone tells you very little.

Incision size is part of the conversation

Larger implants require a longer incision so the gel shell is not stressed during insertion. If a minimal scar matters a great deal to you, that constrains the upper end of your size range. This is a genuine trade-off and worth deciding deliberately. See breast implant scars.

Thinking ahead

If you plan to have children, a larger implant places more demand on a skin envelope that pregnancy will stretch further, which is relevant to whether a lift becomes necessary later. See pregnancy after breast augmentation.

How the decision actually gets made

The measurements produce a range. Sizers and imaging narrow it. Then we talk. My job is to tell you honestly what your anatomy will and will not carry, and to be direct when what you are asking for will not look the way you are imagining. Working closely together at this stage is what produces a result you are happy with at six months, not just at six weeks.

Risks

Breast augmentation is surgery and carries risks including bleeding, infection, capsular contracture, altered nipple sensation, implant rupture, asymmetry and the possibility of revision surgery. These are discussed in full at consultation as part of the consent process.

Mr Ali Arnaout, MBChB, PGDip, AFHEA, FRCS(Plast), MBA — Consultant Plastic, Oncoplastic and Cosmetic Surgeon. GMC 7274609. iQonic Aesthetics, 15 Harley Street, London, and Dublin.