In 2019, the Duchess of Cambridge (Kate Middleton) visited the Lake District. She wore a new (to us) blouse that featured an upright ruffled collar. After much deliberation between bloggers and fans, an eBayer called CopyKate identified the piece: it’s the Marguerite blouse by French brand Sézane.
Kate wore the shirt again for a series of photos taken by Matt Porteus, used for the Cambridge family Christmas card and to promote the new book for the Hold Still project. In April 2021, the Duchess wore the Marguerite blouse for a fourth time, during a trip to Durham.
To celebrate their tenth wedding anniversary on the 29th of April 2021, William and Kate released a family video. In the video, Kate can be seen wearing the Marguerite blouse.
About the shirt:
The Marguerite blouse features a pie crust collar and a distinctive ladder-stitch detail that runs down the front of the blouse and along the cuffs.