>Prince of Wales suit
If you’ve never heard of the Prince of Wales check, you may recognise it by one of its many different guises: glen check, glen plaid and Glen Urquhart plaid. It is a woven design of small and large checks which is usually made up of black/grey and white, but can also feature a range of other muted colors.
It originated in the valley of Glenurquhart in Inverness-shire, Scotland. This is where the checked wool was first used by the New Zealand-born countess of Seafield during the 19th century. It wasn’t until a little later — due to its popularity with Edward VII, or otherwise known as the Prince of Wales — that the fabric started to be referred to as the ‘Prince of Wales check’.
While Edward VII helped make it popular, it was his grandson Edward VIII who made it truly fashionable. Edward VIII was somewhat of a style icon and decided to add blue and red undertones to his tweed. This popularised the check, and cemented its place in the tailoring hall of fame.
https://savilerowco.com/blogs/news/how-to-style-a-prince-of-wales-check-suit