📋 US Passport Photo Requirements
- Size: 2 × 2 inches (51 × 51 mm)
- Head height: 1 to 1⅜ inches (25 to 35 mm)
- Image resolution: 600 × 600 pixels at 300 DPI
- Background: Automatically converted from any background to white
- Face must be clearly visible and centered
- Neutral expression, eyes open