I was given the vital measurements and got set to with paper and pen. I created a paper pattern and then made a prototype from scrap fabric. I sent the prototype out for testing. I wanted to know how it fit. I'd already made some adjustments but needed a pooch to test it for me. The only thing that needed changing was the positioning of the tummy fastening. I was delighted that only minor changes were needed.
Next came the fun bit, finding pretty waterproof fabric. As it was to be a lightweight coat, we teamed it with a coordinating cotton fabric for the lining and we even got velcro to match.