Homemade Snowflake Shirt and Snowman Vest

Homemade Holiday Winter vest and button up shirt. The vest is green with snowmen and is lined with red fabric. The button up shirt is vibrant blue with white snowflakes. My mother in law made these for me for a holiday party a while ago, only worn two times. The vest is 20 inches pit to pit, and the shirt is 22.5 inches pit to pit. Would describe the fit best similar to Medium