サイズチャート
インターナショナルサイズチャート
Understanding standard photo sizes is essential for printing, framing, and creating photo albums. Different purposes require different photo dimensions, and using the wrong size can result in cropped or distorted images.
Standard Print Photo Sizes
4x6 inches (10x15cm): The most common photo print size. Matches the 3:2 aspect ratio of most digital cameras and 35mm film. Perfect for photo albums and standard frames.
5x7 inches (13x18cm): Popular for portraits and framed photos. Slightly larger than 4x6 for more detail. Common for family photos and gifts.
8x10 inches (20x25cm): Standard portrait and headshot size. Common for professional photography, formal portraits, and framed wall art.
11x14 inches (28x36cm): Large format for wall displays and professional prints. Popular for wedding photos and landscape photography.
16x20 inches (41x51cm): Poster-size prints for large wall displays. Best for high-resolution images and professional photography.
Passport Photo Sizes by Country
US Passport Photo: 2x2 inches (51x51mm). White background, taken within the last 6 months. Head must be 1-1.4 inches from chin to top.
UK/EU Passport Photo: 35x45mm. Light grey or white background, neutral expression. Head must be 29-34mm from chin to crown.
China Passport Photo: 33x48mm. White background, specific requirements for head size and position.
Japan Passport Photo: 35x45mm. White background, taken within the last 6 months.
Digital Photo Resolution Guide
For quality prints, use 300 DPI (dots per inch). A 4x6 print requires 1200x1800 pixels. An 8x10 print requires 2400x3000 pixels. Always shoot at the highest resolution possible for flexibility in printing different sizes.
Frequently Asked Questions
Can I enlarge a small photo without losing quality?
Enlarging beyond the original resolution causes pixelation. Modern AI upscaling tools can help, but starting with a high-resolution image is always best for quality prints.
What photo size is best for social media?
Instagram posts: 1080x1080px (square). Facebook cover: 820x312px. LinkedIn profile: 400x400px. Always check current platform requirements as they change frequently.
Photo Size Chart
| Photo Size | Dimensions (inches) | Dimensions (mm) | Area (mm²) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 2R | 2.5 × 3.5 | 63.5 × 88.9 | 5645.15 | ||||||
| 3R | 3.5 × 5 | 88.9 × 127 | 11290.3 | ||||||
| 4R | 4 × 6 | 102 × 152 | 15504 | ||||||
| 5R | 5 × 7 | 127 × 178 | 22606 | ||||||
| 6R | 6 × 8 | 152 × 203 | 30856 | ||||||
| 8R | 8 × 10 | 203 × 254 | 51562 | ||||||
| 10R | 10 × 12 | 254 × 305 | 77470 | ||||||
| Photo Size Chart Maker : iSizeChart.com | |||||||||
About Photo Size Chart
Photo printing size classification and application scenarios
Photo size is in the form of nR where n represents the shorter side of the photo and n is in inches. Eg, 4R size is 4 inches by 6 inches. For 10 inches and below, the longer side is 2 inches longer than the shorter side For 11 inches and above, the longer side is 3 inches longer than the shorter side.
1. Common Photo Print Sizes & Applications.
Sizes: 2 × 2 inches (Passport photos); 3.5 × 5 inches (Standard snapshot); 4 × 6 inches (Most common photo print).
Resolution: 300 DPI (600 × 900 pixels for 2×3").
Best For: Wallet-sized photos; Quick prints (drugstores, kiosks); Scrapbooking, DIY projects..
B. Medium Prints (Framing & Display).
Sizes: 5 × 7 inches (Common for portraits); 8 × 10 inches (Popular for framing); 8.5 × 11 inches (Letter size, photo books).
Resolution: 300 DPI (2400 × 3000 pixels for 8×10").
Best For: Home/office photo frames; Greeting cards, invitations; Small posters or art prints.
C. Large Prints (Wall Art & Professional Use).
Sizes: 11 × 14 inches (Gallery-style prints); 16 × 20 inches (Poster size); 18 × 24 inches (Large posters, canvas).
Resolution: 300 DPI (4800 × 6000 pixels for 16×20").
Best For: Wall decor (homes, offices); Wedding/event photography; Fine art prints.
D. Extra-Large Prints (Commercial & Decorative).
Sizes: 20 × 30 inches (Poster, canvas wrap); 24 × 36 inches (Movie poster size); 30 × 40 inches+ (Billboards, murals).
Resolution: 150–300 DPI (varies by viewing distance).
Best For: Trade show banners; Store/wall murals; Museum/gallery exhibitions.
2. Specialty Print Sizes.
Panoramic Prints (Wide Aspect Ratios): 4 × 12 inches (Landscape panoramas); 8 × 24 inches (Scenic wall art).
3. Key Factors for Printing Quality.
300 DPI: Standard for high-quality prints (viewed up close).
150 DPI: Acceptable for large posters (viewed from a distance).
72 DPI: Only suitable for digital screens, not printing.
②. Aspect Ratio.
Match the camera’s ratio (e.g., 3:2 for DSLRs, 4:3 for smartphones).
Cropping may be needed for non-standard sizes (e.g., 8×10 from a 4×6).
③. File Format.
JPEG: Best for most photo prints (compressed but high quality).
TIFF/PNG: Lossless formats for professional editing/printing.
RAW: Used for advanced editing before conversion.
4. Application Scenarios.
Print Size: 5 × 7" – 8 × 10". Best Use Case: Framed portraits, certificates, gifts.
Print Size: 11 × 14" – 16 × 20". Best Use Case: Wall art, wedding photos, exhibitions.
Print Size: 20 × 30"+ . Best Use Case: Posters, banners, large-scale decor.
5. Pro Tips for Printing.
Use Soft Proofing: Adjust colors for the printer’s color profile (CMYK vs. RGB).
Test Print: Print a small version before large-scale production.
By selecting the right print size and resolution, you ensure sharp, professional-quality photos for any purpose—from personal keepsakes to commercial displays.