"Hats should be worn; a headpiece which has a base of four inches (10cm) or more in diameter is acceptable as an alternative to a hat"
Daily Telegraph: Royal Ascot to tighten dress code
The Guardian: Royal Ascot pins down hat guidelines
If you'd like to discuss your own individual requirements for ladies day and ensure that you don't fall foul of any Royal Enclosure dress codes, please get in touch! When commissioning your hat, I am always happy to discuss colour and fabric preferences to achieve the perfect look for your outfit.