The only way to order the correct size is to follow these instructions and use the charts provided
At the end of each jacket description you will see a link taking you to the measurement chart
Each manufacturer has their own chart so download the correct one.
All jackets are in European sizes, not UK inches
The size you take in a blazer has no relevance to the size you'll need in a shooting jacket
Take all measurements in CMs over your normal shooting underclothing
Measurements should be taken pretty taught, with just one finger under the tape.
The tape should be held tight enough so that it will not fall down, but not so tight that it digs in
The chest measurement should be taken at the widest point of the chest, pretty high up under the armpits
Any questions please get in touch via the contact page
You will need Acrobat reader to view the file, download here
Download Acrobat Reader