Wallet photos are typically 2" x 3" in size. This size is the industry standard for wallet photos and is small enough to fit in most traditional leather wallets with photo slots. Other sources also confirm that wallet photos are 2" x 3" in size, including Walgreens, Walmart, CVS, and All-Ett. When ordering wallet photos, they are usually printed on a single 4x6 piece of high-quality photo paper, with four photographs printed on it.