The squares below make 6″ squares (using the same hooks and yarn).
Butterfly Garden: https://www.ravelry.com/patterns/library/17-butterfly-garden-square
I can’t remember what this one was called. Sorry 😦
The Victorian Lattice Square: https://www.ravelry.com/patterns/library/victorian-lattice-square
The latest one to catch my eye was this one from Haafner: https://www.ravelry.com/patterns/library/smitten-blanket
She calls it her Smitten blanket (she made several squares and joined them together). It’s really lovely.