The ever-popular prince of wales check is properly the Glen plaid or Glen Urquhart check In the 19th C the Countess of Seafield used to dress her gamekeepers from 19th C. The cloth was favoured by Edward V111 when he was Prince of Wales; and the anecdotal name has stuck.
Prince of Wales check is still a popular choice for mens suits and als for furnishing cloth. Similar to houndstooth in weave, with alternating colour blocks of 2 : 2 and 4: 4. An over check in a single thread brighter or contrasting colour- yellow, turquoise, red for example, makes it’s own statement