This is a knit hat for dogs with ear holes. 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 less stretchy, so I've chosen to use straight needles even though it takes more time. The face and neck areas are ribbed, and the crown is stockinette stitch. The main body is knitted with four strands of yarn held together for warmth and durability. The ribbing provides good elasticity, and to further adjust the size, flat elastic is threaded around the face. I've been making knit hats for dogs for 5 years, and I knit each one carefully, with the hope that your dog will be warm and comfortable. ■ Size Face circumference: 38cm - 42cm Please measure your dog's face circumference, from the base of one ear, across the forehead, under the chin, and back to the starting point. ■ Materials Main body: Wool blend (100% wool and a blend of 70% wool and 30% acrylic) Pom-pom: Wool blend, acrylic 6-wale flat elastic 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. Because it is a wool blend, please hand wash in lukewarm water and avoid wringing. Hang drying may cause stretching, so remove excess water with a towel and dry flat. Pilling may occur due to friction, so please cut them off with scissors.