I don't know what technique it is, I just googled stack and whack and followed the pictures.
The blocks are 12 inches each. I'm going to quilt them individually and then put them together and will sew around the squares. I do plan on adding a border as well. Right now it's about 36x48 .. it's going to be a lapquilt for my living room.
I also ended up mixing up the colours - so not just pink on one side and brown on the other!