Please provide specifications for the photographs that are required to
be submitted with the Application for Naturalization as a U.S.
Citizen (Form N-400). Are these the same specifications that would be
used for U.S. passport photos?

Hello Cambridge1,


Are these the same specifications that would be used for U.S. passport photos?

Yes,according to the U.S. U.S. Citizenship and Immigration Services  

Special Instructions

?Effective August 2, 2004, USCIS has changed its requirements for
photographs to a standard passport-style photograph.?

Form N-400 
http://www.uscis.gov/graphics/formsfee/forms/n-400.htm


Specifications

?In accordance with language specified in the Border Security Act of
2003, U.S. Citizenship and Immigration Services (USCIS) announced a
change in the photo requirements for all applicants from a
three-quarter face position to a standard, full-frontal face position
to take effect August 2, 2004.

All photos must be of just the person. Where more than one photo is
required, all photos of the person must be identical. All photos must meet
the specifications for full-frontal/passport photos.?
http://www.uscis.gov/graphics/publicaffairs/newsrels/04_08_02Photo_flyer.pdf

More information on photo standards 
http://travel.state.gov/passport/guide/guide_2081.html


Specifications

The following web pages present the latest recommendations for
passport and visa photographs.

Photograph Print Properties
Produce 2 inch x 2 inch (51 mm x 51 mm) color photo.
Print photo on thin photo paper or stock.
Ensure the print is clear and has a continuous-tone quality.
Do not retouch or otherwise enhance or soften photo


Setup and Production Guidelines 
http://travel.state.gov/passport/guide/setup/setup_873.html

Composition


Frame subject with full face, front view, eyes open 
 
Make sure photo presents full head from top of hair to bottom of chin;
height of head should measure 1 inch to 1-3/8 inches (25 mm to 35 mm)
 
Center head within frame (see Figure 2 below)
 
Make sure eye height is between 1-1/8 inches to 1-3/8 inches (28 mm
and 35 mm) from bottom of photo
 
Photograph subject against a plain white or off-white background 
 
Position subject and lighting so that there are no distracting shadows
on the face or background
 
Encourage subject to have a natural expression 
http://travel.state.gov/passport/guide/composition/composition_874.html

Photo Quality
http://travel.state.gov/passport/guide/quality/quality_879.html

FAQ
http://travel.state.gov/passport/guide/faq/faq_881.html 


Download the complete Photography Guide here:
http://travel.state.gov/passport/guide/download/download_884.html


U.S. Passport & U.S. Visa Photography Guide
http://travel.state.gov/pdf/Photo%20Guide%2010-01-04.pdf



Search terms used: 
Form N-400 photographs specifications


I hope the information provided is helpful!

Best regards,
Bobbie7

Thank you for a very thorough, well-documented answer.

Thank you very much for the five star rating and tip!
--Bobbie7