Hi! Yes, these should be US sized passport photos. We had to send in 4 to our lawyer, but I recommend getting a few more. We had to send ours to our lawyer, and they got lost in the mail. If possible I also recommend your mom going to a photography store and have them send her the photos in a digital format. Then she can forward the image and you can go to a CVS and print them out yourself, since overseas mail can either be very slow or sometimes lost.