Balmain Blue Denim Blazer with Gold Buttons — Size 40 / AU 8-10

Zimmermann uses its own numeric sizing rather than standard Australian sizes, which is the single most common reason people hesitate before buying. Here is how it converts.

This is the conversion used by Zimmermann's authorised stockists. Note that 00 follows petite sizing and is generally suited to anyone under about 160cm.

The chart is a starting point, not the whole answer

Fit varies considerably between Zimmermann collections. Corseted and boned styles run firmer through the bodice, while linen pieces and anything with a relaxed or billowing cut can comfortably take a size up. That is why a size 1 dress often suits an AU 8 through to a small AU 10 — the same label behaves differently depending on the cut.

For reference, Zimmermann's own runway and campaign models are typically around 175cm and wear a size 1.

How to be certain

Every piece we list carries flat measurements in centimetres. The most reliable method is to lay out a garment you already own and love the fit of, measure it flat across the same points, and compare. That will tell you more than any size label.

Where a particular style runs noticeably true, small or generous, we say so in the listing.

Buying preloved Zimmermann

Archive and older-season pieces can differ from current sizing, and anything altered by a previous owner will differ again. We note any alteration we find. If you are unsure about a specific piece, get in touch and we will measure it again for you before you buy.

Browse all preloved Zimmermann · Shop size 1 · Shop size 2