That’s why the fair-haired often have that enviable porcelain complexion. To be sure, though, pore size is more than a matter of coloring. Generally speaking, pores are largest on your nose, forehead and chin, and smallest on your cheeks and around the outside of your face. The bottom line: Your pore size is genetic. But no matter how small they start out, failing to exfoliate, sun damage and clogging stretches them out. To keep your pores at their pin-holiest, protect your skin from the sun, wear non-comedogenic makeup and keep up a good skincare regimen.