this looks so easy, but wondering what size to make the blocks. I'd love to try it. It looks basically like just 4 patches and half square triangle around a big square.

This one looks like a 16 patch, (4x4) with the 4 center boxes replaced by one larger

For a 12" block:

That makes each square 3 - 1/2" (3" finished, 3x4=12)
for half square triangles, I'd cut matching squares an inch bigger (4-1/2"), mark diagonal, sew 1/4" on both sides and cut down the middle. That gives a bit of wiggle room to trim perfectly.

The paper piecers can point you to dog patterns. If you look at quilterscache.com, you can browse through and get a name for the main block. If you save pictures from the internet, you can rename them to the block name or referring site to make easier to find again.

In general, if you see a pattern online, the person that posted has easy access to the information.

I did look on Quilters cache but couldn't locate this block...

I thought someone on here posted the dog quilt.(site for charity quilt) Its ok. I'll stick it on the back burner for now. Someday when I run across it again, I'll make it