This is a knit hat for dogs with ear holes. It's knitted with four strands of yarn: 100% wool ice gray bulky yarn, medium-fine heather gray, and heather bulky yarn, to make it fluffy, warm, and durable. A string is threaded around the face for size adjustment and to prevent slipping. It's made with soft, stretchy, and comfortable wool blend yarn using knitting needles for a comfortable fit. Although crochet hats can be made faster, they are stiff and don't stretch well, so I've chosen to use knitting needles even though it takes more time. The face and neck are ribbed, and the top of the head is stockinette stitch. I've been making dog knit hats for 5 years, and I knit each stitch carefully, hoping your dog will spend their time warmly and cutely. ■Size Face circumference: 40cm-44cm Please measure the circumference of your dog's face, from the base of the ears on the forehead, under the chin, and around. As this is a handmade item, it is not perfect like commercially available products. Although each one is carefully knitted, there may be some loose thread ends or slight irregularities in the stitch pattern. Knit products may unravel or tear if pulled strongly or subjected to impact. Please hand wash in lukewarm water and avoid wringing. Since it will stretch if hung, remove excess water with a towel and dry flat. It will be shipped via Yu-Packet Post Mini. It will arrive flattened, but please note that it will return to its original shape if you shake it lightly or steam it.