Can I alter a shirt by unassembling it and recutting it in a smaller size?

Question

I made a men's shirt in large but now it fits my bf too big. Can I unstitch the shirt and make it in size medium by using the same material as previously cut in the wrong size?

Answer 1

You might be able to do it.

Look at your pattern pieces. If you cut off areas that are meant for the smaller size, you probably won't be able to unless you can figure out what you cut off.