Well, if you use Photoshop, it's pretty simple.
You take the original pictures of each character singular. Then you simply make it bigger and drop the opacity.
Next, you make an all new layer and use the gradient tool to make the faded gray effect.
Then, with the shapes tool, you can make the border you see here. Use the square and line tool for best results. Fill in the empty space to make the border.
After all of this, you take the enlarged singular characters and cut the sides that are out of the boxes you created.
Note: you have to have the characters in different layers for this to work best.
Have fun. C: