In order to make clothes fit to the character, you need a decent pattern to work from. This can be done by just adjusting over and over a piece of material by placing it on the model until it fits. I prefer a different method. By covering any object in cling film, and then masking tape. You get a perfect cocoon of the character. You can then draw on where your seam lines will go, remembering to label which piece is which and then cut it off. leaving you with pattern pieces which fit your character perfectly. I will now start sewing clothes.