Photo size guide
2×2 Inch Photo Size: Pixels, mm, cm & Common Uses
Convert a 2×2 inch photo between pixels, millimeters, and centimeters—and understand where this square format is actually used.
Quick answer
2 × 2 in = 50.8 × 50.8 mm = 5.08 × 5.08 cmAt 300 PPI, that equals:
600 × 600 pxPixels are not a fixed physical measurement, so the pixel dimensions change depending on PPI.If you have been asked for a “2×2 photo,” you are probably dealing with a U.S. passport, visa, or another process that asks for a passport-style photo.
A 2×2 inch photo is always physically 2 inches wide and 2 inches high, but its pixel dimensions change with PPI. At 300 PPI, it becomes 600×600 pixels. This guide explains that conversion and the format’s common U.S. uses.
2×2 Photo Size in Pixels, mm and cm
Why Is a 2×2 Photo Often 600×600 Pixels?
PPI means pixels per inch. Multiply the physical width by the selected PPI: 2 inches × 300 pixels per inch = 600 pixels. Because the photo is square, the result is 600 × 600 pixels.
That does not make 600×600 a universal digital size. At 150 PPI the same physical photo is 300×300 px; at 600 PPI it is 1200×1200 px. For an official online application, follow the receiving organization’s pixel, format, and file-size rules.
Need another resolution? Use the PixEasy Image Size Calculator to convert inches or millimeters to pixels at any PPI.
Is 2×2 Inches the Standard ID Photo Size in the U.S.?
Not exactly. The 2×2 inch square format is best understood as a common U.S. passport-style photo size. It appears in passport, visa, and some immigration-related requirements.
The United States does not use one universal 2×2 format for every ID. Driver’s license and state ID photos, for example, are commonly taken during the application process rather than supplied as a separate print.
Where Are 2×2 Photos Commonly Used?
U.S. passport
The State Department currently requires a printed 2 × 2 inch (51 × 51 mm) square photo. Size alone does not guarantee acceptance; composition and image-quality rules also apply.
U.S. visas
Printed-photo and digital-image requirements vary by visa and submission method. Current State Department digital specifications use a square JPEG between 600×600 and 1200×1200 pixels, up to 240 KB, when those digital requirements apply.
Diversity Visa
The current photo-requirements page lists a square JPEG, 600×600 pixels, and no more than 240 KB for an online DV entry. Always check that year’s official DV instructions because program requirements can change.
Some immigration applications
Some applications may ask for passport-style photos, but not every USCIS form does. Follow the instructions for the exact form and filing situation.
What Size Is a U.S. Passport Photo?
The current printed-photo requirement is 2 × 2 inches (51 × 51 mm). The head must measure 1 to 1⅜ inches (25–35 mm) from the bottom of the chin to the top of the head.
For background, expression, head position, glasses, and other requirements, read our complete U.S. Passport Photo Requirements guide.
How to Make a Photo 2×2 Inches
1. Crop the photo to a square
A 2×2 photo uses a 1:1 aspect ratio. Remove unnecessary areas while keeping the subject positioned according to the application rules.
2. Choose the required pixel size
For a 2×2 image at 300 PPI, use 600×600 px. Calculate first when another PPI is required.
3. Resize without stretching
Resize the square crop to the required pixels. Use Resize Image to crop to 1:1 and set the exact output size in your browser.
4. Check the application requirements
Confirm pixel dimensions, format, maximum file size, and composition rules before submitting.
2×2 vs Other Photo Sizes
A 2×2 inch photo is square, measures 50.8×50.8 mm, and is a common U.S. passport-style size. Many other countries use rectangular passport-photo formats. Do not assume that every document described as a “passport photo” uses 2×2 inches.
Frequently asked questions
At 300 PPI, a 2×2 inch photo is 600×600 pixels. At other resolutions, the pixel dimensions change.
Not always. 2×2 inches is a physical size, while 600×600 pixels is a digital size. They correspond at 300 PPI.
2×2 inches equals 50.8×50.8 mm.
2×2 inches equals 5.08×5.08 cm.
Yes. The current printed-photo requirement is 2×2 inches (51×51 mm), and other composition rules also apply.
No. It is a common U.S. passport-style format, not a universal size for every U.S. identification document.
Yes, but crop a rectangular image to a square first instead of stretching it.
No. Dimensions alone do not guarantee acceptance. Composition, background, quality, format, and other conditions may apply.
Official sources
Requirements can change. This guide was last checked in August 2026; always confirm the current rules for your application.