When designing layouts for your scrapbook, knowing how big is a 5x7 photo can come in handy. According to Visuals Clipping, a 5 × 7-inch print would be larger than a 4x6 print and fit a lot of the smaller scrapbook pages and be a good size for a single portrait, event pictures, and special memories. A 5x7 can also be used in conjunction with smaller photos, captions, decorative items, and borders.