Waistcoat Alteration

[sydnie7]

That is rather what I thought. But where should the increase in size be - central or armpits?

Regards

Chas

I would distribute the increase between center back and side seams. You may need to add at the shoulders as well, just a little bit but those "small" fronts need to move forward in all dimensions.

Do you have another vest that fits, that you could trace a starting pattern from? Because the fronts will remain "small," you will probably need to put even more at the side seams and shoulders than your well-fitted vest has. Cut the new back piece out of muslin or other scrap fabric and do test fits before putting scissors to the final fabric.

DCat has a good suggestion as well and much easier, depends how you want the final to look!