Photo print sizes refer to the dimensions of printed photographs, which can vary widely. Common sizes include 4x6 inches, 5x7 inches, and 8x10 inches. These measurements indicate the width and height of the print, allowing for different framing and display options. When choosing a print size, consider the intended use, such as displaying in a photo album or hanging on a wall. Larger prints, like 16x20 inches, can make a bold statement, while smaller sizes are often used for keepsakes or gifts. Understanding these sizes helps in selecting the right format for your images.