Over fifty years since it's release, the Persol 714 still remains one of the most iconic styles of all time.
Notably made famous by Steve McQueen, who wore them on and off the big screens, in such movies as the "Getaway" and "The Thomas Crown Affair".
To pay tribute to the "King of Cool", Persol released the 714-SM, which is the same as the Persol PO 714, but this limited edition piece features Steve McQueens name on both the leather case and on the frames itself.
The 714 is a wonderful style, with it's foldingability, you can carry them with ease and fits snugly in your pocket.
If you already own a pair of glasses and they fit you well, you could check the ones you have to see a rough idea of the size you are needing or if you saw something in a store you liked, just write down the size if it fit you well.
Usually, the size is written in 3 consecutive numbers, the first 2 numbers are 2 digits and the last a 3 digit number, this is usually on the inside of the temples, like this 58-16-145
All measurements are in millimeters. It only has the numbers on the frames, but it'll be like this 58mm-16mm-145mm
The first number is always the eye size (width of one lens) so the lens size would be 58mm
The second is the bridge (nose part) width, so the bridge would be 16mm
The third is the temple length, this is the total length if it were straighten out, as all glasses are bent near the end to wrap around your ear. So the temple length is 145mm