This is a knit hat for dogs with ear holes. Made with two strands of 100% wool bulky yarn, it's designed to be soft and stretchy. The face and neck are ribbed, and the crown is knitted in stockinette stitch using knitting needles. A knitted cord is threaded around the face for adjustable fit to prevent slipping. While crocheted hats are quicker to make, they tend to be stiff and less stretchy, so I chose to use knitting needles, even though it takes more time. I've been making knit hats for dogs for 5 years, and I knit each stitch carefully, hoping your dog will be cute and warm. ■ Size Face circumference: 32cm - 36cm Please measure your dog's face circumference from the base of the ears, across the forehead, and under the chin. ■ Materials Body: 100% wool Pom-pom: Wool blend acrylic Please note that this is a handmade item and is not perfect like commercially produced goods. While I knit each one carefully, there may be some loose thread ends or slight irregularities in the stitch pattern. Knit products can unravel or tear if pulled strongly or subjected to impact. Wash by hand in lukewarm water and avoid wringing. Dry flat after removing excess water with a towel, as hanging may cause stretching. Shipped via Yu-Packet Post Mini. The hat will arrive flattened, but it will regain its shape if you shake it gently or steam it. Thank you for your understanding.