Irwin Foster G-1 Sizing Question

[G-1_USN_USMC_USCG]

Fellow G-1 Collectors,
I am looking at a Irwin B. Foster G-1 on eBay in Size 46. I tend to fit a larger 46 to a 48. Based on your experience, would the IB Foster 46 be a bit snug for me? Just wondering if it is worth the bidding. Thanks
Cheers,
Mike

 

[Peacoat]

What is the year?

 

[G-1_USN_USMC_USCG]

Peacoat,
Good evening. The description says it is a 1962 or 1963 jacket. Label reads:
Jacket, Flying, Man's
Intermediate, Type G-1
Spec. MIL-J-7823C (WEP)
Irvin B. Foster Sptswear Company
Contract No. DSA-10003081
Size 46

Thanks for your time and your advice.
Cheers,
Mike

 

[Peacoat]

My Irvin B. Foster is a 1962 jacket. It is a size 44 and fits my 40/42 chest with room to spare.