David Luke's unisex eco jacket is made from 100% polyester which has been recycled from plastic bottles. Their industry leading, eco-friendly approach means that they always strive for the best. This is transferred to our ability to ensure that the durability, practicality and quality of blazers and eco-jackets are of the highest standard.
Size Guide - https://www.davidluke.com/wp-content/uploads/2020/07/David-Luke-Size-Charts.pdf
This is a DL1994 Blazer
As a rough size guide;