Ok I only have the 4 previewed icons as a reference, but I would keep it the same. Your twitter bird reaches inside the outer border of you icons, while the youtube doesnt. I would recommend you edit the twitter Icon so that you can clearly see the border^^
Thanks Nord I see what you are saying I totally forgot about that. These icons are in the beginning stages and input would greatly help me for first time icons please feel free to make any more suggestions. How about this one I still need to do the border thing but just quikly did this one.