I picked a square, sat down with my super-bulky yarn and made:
It's only, uh, slightly larger than 12-inches. Here's the block with a ruler for scale:
More like 26-inches. Which I am okay with because 6 squares will make a generous blanket that completely covers a full-sized bed. The only sucky part is that it takes a little more than 4 balls of the Encore Mega to make one square; there are going to be lots of ends to weave in. I wish they sold Encore Mega on cones.
I'm having a hard time trying to decide which block to make next. The one above was easy and I love the button stitches (roughly the size of a quarter each)- it's a great texture to run your hand across. Maybe cables next? I don't think I should do bobbles since they would end up being as large as clementines.