The pattern for the edging and the square can be found on my Free Patterns page. If you want to go directly to the magic square pattern click HERE and the edging instructions are available in a blog post click HERE.
The finished square measures 10.6 inches x 10.6 inches when tatted in size 40 thread. I used Lizbeth size 40 in Ocean Teal Medium and DMC Cordonnet Special size 40 in white. One ball of each was plenty to finish the square.
Here are a few more photos:
This edging can easily be turned into a bookmark as well, which I will share in a future blog post.