With the shoulder or yoke seams glued or sewn, test fit the vest on your doll. Check that the fit is correct on the under arms, back neck seam and waist line of the doll. As this first vest is made from a non woven fabric, you can easily adjust the neckline or arm holes by marking carefully with pencil where changes are necessary. If you have made a vest with a western style yoke, make sure the yoke lines fall evenly on the doll and that the vest is not pulled to one side or the other. Adjust the fit if necessary.
If Your First Vest Doesn't Fit
Adjust the shoulder seams if necessary and adjust the underarms and the neckline. Try to determine what went wrong. Was your fabric too thick for your pattern design (is the vest too tight across the back)? Did you make the armholes too small when you glued or sewed the shoulder / yoke seams? Does your vest hang strangely on the doll at the front now that it is made of fabric heavier than your interfacing pattern?. Adjust the vest if necessary. In the worst case, make adjustments to the pattern you cut the vest fabric from and try again.