Guys and Gals, when it comes to the uniform do not be in a rush the day you want to pick it up.
There is no system to the sizes despite some of the postings.
You will want to try on ALL items of the uniform just to make sure everything fits. All my trousers, jackets and service jackets are all the same size but the indicated size on the labels differ completely! I think they are sown on by blind people to be honest!
And just from experience, give yourself an extra inch or so around the waist, you will bloat onboard and it gets very uncomfortable!