Knit Fa La La Dog Sweater. This sweater will want everyone to sing Christmas carols! This striped hand-knit sweater has "Fa La La" on the back. Great for a night of caroling or the holidays! Machine washable. Our model Rosie a 25 lb. Mutt is wearing a size L. Sizing:XS: Length: 7-9 in.S: Length: 9-12 in.M: Length: 12-15 in.L: Length: 15-18 in.XL: Length: 18-22 in.