really with a pup that age I would just be putting an old windcheater on her, pulling it together around the waist. If you have very basic sewing skills you can make a coat from polar fleece, it doesn't need hemming. It will cost you a fortune if you buy proper made coats for the next 12 months or so.
Many thanks Rebanne, you have confirmed my thoughts. After a -1 morning this morning it's time for a visit to Spotlight.
Reynard