Bronx and Banco Size Guide: How the Letter Sizing Runs

Bronx and Banco sizes on a letter ladder rather than a number. Most pieces run XS to XL, a few add XXS and XXL, and a handful of the chiffon and organza pieces are sold in dual sizes, XS to S and M to L. The house cuts close through the bodice. This guide maps the letters to UK, Australian and US sizes, and tells you when to stay with your letter and when to move.

The conversion table

Luxury Handbags shows the full letter ladder on every product so the size selector reads the same across the brand. Where the source sells a piece as XS to S and M to L, the product page lists the letters that dual covers.

How the house cuts

The gowns and minis are fitted through the bodice and the waist. The sequin and tulle pieces have almost no stretch, and the corseted pieces are boned. Take the letter you usually wear. If you sit between two letters in a corseted, sequin, tulle and velvet piece, take the larger. There is no room to let out a boned bodice.

The separates behave differently. The croc embossed pants and joggers sit at the natural waist, so the waist is the fit point. The teddy coats, the faux fur coat and the suede jacket are cut with room for a layer underneath. The Oversized Sweatpants and the off-the-shoulder sweatshirt are generous by design, so your usual letter gives the intended line.

The one the brand says runs large

The brand flags one exception itself. On the Estelle Butter Yellow Mini Dress it writes that the style runs large, and suggests sizing down if you are between sizes. That is the only piece in the current range with a sizing note from the house, so treat everything else as true to size with the close cut in mind.

What the model wears

Every product in the current range is photographed on a model in a size XS. Use that to read the length rather than the fit. A maxi that pools on the XS model will pool on most frames, and a mini that sits high will sit high.

Dual sizes, explained

A few of the fluid pieces, the Ashanti organza set, the Calia chiffon set and the Mosi chiffon set among them, are sold as XS to S and M to L. These are drawstring, tie and elastic cuts, so one size covers two letters. If you are at the top of a dual, for example a firm S, the M to L is the safer order in the pants and the XS to S in the tops.

Pre-order sizing

The Fall Winter 2026 pieces are sold on pre-order, with the dispatch date on the product page. The size you order is the size the house cuts, so pick it as carefully as you would for a piece in stock. If a pre-order piece does not fit on arrival, the returns terms are in the Luxury Handbags logistics and returns protocol.

For the pieces, start with the best Bronx and Banco dresses. For the new outerwear and separates, see the Fall Winter 2026 edit. For the occasion-by-occasion approach, read how to style Bronx and Banco.

Frequently asked questions

Does Bronx and Banco run small?

It runs close through the bodice rather than small. Take your usual letter, and the larger letter if you are between sizes in a corseted, sequin, tulle and velvet piece.

What size is a UK 10 in Bronx and Banco?

A UK 10 sits at S to M. Take the S in a fluid piece and the M in a boned, non-stretch piece.

Does Bronx and Banco go up to XXL?

A few pieces do. Most of the range runs XS to XL, with XXS and XXL on selected styles.