As soon as puppies are getting wet and dirty outside, owners often ask this question. Many dogs, by four months onwards, depending on breed, can buy a Drying Coat they will grow into – but not all. The coats fit ‘early’ because they are so adjustable. The belly flap can be extended or tightened by over 12 inches on a M coat for example. On excitable young dogs the leg straps at the back help the coat to stay in place too. Making sure the neck is fastened with the Velcro, and turned back, is also important at this stage. But, if the coat is too big, there is a danger of tripping or the dog being able to get out of it. When looking at the sizing, if your puppy is approaching the weight range of the size you think they will be within when they are fully grown, then it is likely that you can buy that size for them to ‘grow into’.