How to adjust pictures to be my lock screen with the new iOS7 iPhone update?

How do I adjust pictures to be my lock screen with the new iOS7 iPhone update? Before I use to me able to (in my camera roll) pinch the picture so it shrunk and that way it make it bigger if needed for Instagram or wallpaper purposes. But I can't do that with the iOS 7 update now:( so my pictures are way to big and doesn't fit the lock screen. Please Help!

I am having the same issue. The only way to make it a little smaller is to use an app called InstaSize, save it to your gallery and then try to adjust it as your wallpaper.