AP(I-131)照片的格式--from USCIS website:
You must two identical color photographs of yourself taken within 30 days of the filing of this application. The photos must have a white to off-white background, be printed on thin paper with a glossy finish, and be unmounted and unretouched.....
Passport-style photos must be 2” x 2”. The photos must be in color with full face, frontal view on a white to off-white background. Head height should measure 1” to 1 3/8” from top of hair to bottom of chin, and eye height is between 1 1/8” to 1 3/8” form bottom of photo...