Cockpit nylon B15 sizing

[MGfan]

I have been thinking of buying a Cockpit B15 in nylon. My question is about sizing. The sizing tool on there website shows I should purchase a medium. I’m 64 years old and haven’t worn a medium since probably the late 1980s. generally I wear a xtra large sometimes a large. Anyone own one of these jackets who can tell me about their fit. For reference I’m 5’10”, weigh 205.

 

[Aloysius]

You don't sound big by any stretch of the imagination. You would have been issued a medium or small on an issued B-15.