While colder weather brings plaid to the forefront (think: cozy flannels and pleated skirts), it's truly a timeless print. That's why it's no surprise that the pattern has made its way to our ...

Plaid may come and go as a fashion trend, but for the royal family, it's a staple, no matter the year. Plaid as a pattern actually originated in Scotland, and is commonly referred to as tartan.