This hat is crocheted in an open mesh design using black acrylic yarn. I have trimmed the edge with pink yarn and made a matching crocheted rose. The hat is 20 inches in diameter, but will stretch to fit a head size of 24 inches. While I recommend hand washing all knit and crocheted items, this hat can be washed in your washing machine on cold, lay flat to dry. Made in my smoke free home. I do have a guinea pig but she doesn't crawl all over my crafting supplies! Overseas buyers, please contact me for shipping rates.