This is a knit hat for dogs with ear holes. It's made with 100% wool and four strands of bulky yarn held together to make it fluffy, warm, and durable. The face and neck are ribbed, and the top of the head is stockinette stitch. A size-adjustable string is threaded through to prevent slippage. To ensure a comfortable fit, it's made with soft, stretchy, and skin-friendly wool blend yarn, knitted with straight needles. While generally, crochet hats are quicker to make, they tend to be stiff and not very stretchy, so I've chosen to use straight needles, even though it takes more time. I've been making knit hats for dogs for five years, and I knit each stitch carefully, hoping your dog will spend their time cutely and warmly. ■ Size Around the face: Approximately 40cm Please measure the circumference of your dog's head, from the base of the ears on the forehead, around under the chin. ■ Materials Main body: Wool blend (3 strands of 100% wool and a blend of 70% wool and 30% acrylic) Pom-pom: Acrylic As this is a handmade item, it is not perfect like commercially available products. Each one is carefully knitted, but 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 understand that it will return to its shape if you shake it gently or steam it.