Children need photos to apply for social security cards.

1. Whether a child needs a photo to apply for a social security card depends on his age. If it is a newborn, you don't need a photo. 2. If photos are needed, the electronic version standard of photos required by social security is 1 inch, 26mmX32mm, 9-20 K in size, 358X44 1 in format JPG. This is a unified national standard.