This is the one I use for instagram, it has the white ones plus alot of other types (which I actually use more then the white).

http://www.softdd.com/mobile/square-bord...

You need a program that will do that. Don't know of anything free.

Hi. So I know apps that can put your pics In white borders for Instagram, but I'd like one kind of border for all my pics, despite the size of the different pics. Does that make sense? I put a picture up so you can see an example ..

If theres no apps like that, do you have any suggestions on what I should do? Thanks!