3.  Here's where the frame really begins. What we are going to do is actually increase our canvas size.  Our photo doesn't change; it just adds a little more room to our canvas. So go to Image > Canvas Size.

Now follow the settings in the below picture.  Having relative checked is very important as that tells Photoshop to add pixels relative to what you already have.  I choose a size of 30 because that's what I had in mind when starting this tutorial.

3b. The reason for this step is to allow you more flexibility when working with your frame if you want something more complicated.  Because I want the first border around my frame to be white, I created a new layer below my photo layer (click on  the layer with your photo, press ctrl and click the new layer button) and filled it with white (if white is already your foreground color just press alt + del). Now if you want to add any effects or change the color of this area you can easily manipulate this layer.