Our new sweaters were inspired by the timeless traditional Irish knitting patterns used to tell the story of the Irish fishermen. They are soft and warm, 100% acrylic so they can be machine washed and dried. To determine size, measure from the base of the neck to the base of the tail. For dogs with a little more weight or fluff, go up a size. Machine washable and dryable. To properly fit your dog for a sweater or coat, measure from the base of the tail to the base of the neck as shown below.