Preen, the catwalk label designed by the husband and wife duo Justin Thornton and Thea Bregazzi and worn by the Duchess of Cambridge and Gwyneth Paltrow, has finally launched a collection which has quickly become London fashion week’s most affordable collection. Prices start at 65 p.

Preen’s collection only has around 6 styles or pieces. It is made in the shape of a postage stamp as a six-stamp collection celebrating 20 years of the brand.

The first-class stamp features the red Finella dress which was worn by the duchess on a royal tour of Canada. The “Power Dress” that first made the label well-known is shown on another stamp.

Preen left the super tight bandage dress behind about a decade ago and has ushered in new calf-length hemlines and looser fabric that have dominated modern fashion aesthetics.