The Duke of Sussex's wedding outfit was the frockcoat uniform of the Household Cavalry (the 'Blues and Royals'), made by tailors at Dege & Skinner on Savile Row.  As the uniform specially commissioned for the occasion is required for use by His Royal Highness, this is an identical uniform made for The Duke by Dege & Skinner a few years earlier.

I chose the frock coat as a uniform, with permission from my Grandmother, because I think it’s one of the smartest Household Cavalry uniforms. It’s one of my favourites, and I was very fortunate to be able to wear that on the day

His Royal Highness The Duke of Sussex

The uniform's single-breasted blue doeskin jacket has figured braiding of Regimental pattern on the stand-up collar and sleeves. It is ranked to Major with large gold embroidered crowns on the epaulettes.  The trousers, officially called 'overalls', are made from a blue and black wool barathea and are fastened by a leather strap and buckle underneath the boot.