Hi Sooners! Sooner we get started, the better...
(corny joke!)
Special welcome to our newbies. This is the most fun swap. You are going to have a ball.
Thought I'd get that ball rolling by posting a few places I love to find my 12.5" blocks:
Quilter's Cache... you can search alphabetically or by block size
http://www.quilterscache.com/QuiltBlocksGalore.html
Generations (scroll down to the blocks), all sizes
https://www.generations-quilt-patter...-patterns.html
The Spruce
https://www.thesprucecrafts.com/coll...tterns-2821072
Patchwork Square
https://www.patchworksquare.com/inde...k1=60&link2=46
The Quilting Company (formerly McCall's)
https://www.quiltingcompany.com/150-...squilting-com/
Jinny Beyer
https://jinnybeyer.com/block-library/
Books by Judy Hopkins:
Around the Block
Around the Block Again
Once More Around the Block
Judy Martin's
Ultimate Book of Quilt Block Patterns
Quiltmaker's 1000 Blocks
There are tons more books out there. Just be sure the pattern you are using is for a 12.5" (unfinished) block. Some of these sites and books have the patterns available in more than one size.
Have fun!