Home Depot has a special going on right now for a 7" + 4.5" rafter square combo. The link is only for reference. They do NOT have this on their website.
The 7" is normally 14.97 by itself. So, you're getting a 4.5" for free (~$10.97 value).
My local Depot only had 6 hanging on a clip (the next aisle over from where the other squares were located).
SKU # 045242591565