@Ross the first post was edited July 2025? Want to make sure that size chart in the first post is right before basing my order on it.

I'm 178cm tall weighing in at 84kgs and wear a Wabash Western shirt in a size Large

To my calcs i'm going to order a size Medium - does that sound right?

Noting I will mostly wear a t-shirt underneath as i'm from Melbourne and it rarely gets below 4 degrees celsius here.