I was very pleasantly surprised at the nice buttons I found at JoAnn Fabrics. They have a really nice new selection of modern buttons that worked great with the hats. They are now winging their way East. I would definitely make this pattern again.
Specs on these –
Knitpicks – Shine worsted in Grass and Crocus. I made the green one a bit longer.
Needle size 5 for me – I always need to go down two needle sizes with cotton.
Pattern is a freebie found on Ravelry – Pi Topper Chemo Cap.