Men size Medium. 20 inch preferred
I just bought this one on Ebay I sent the guy an message through Ebay and he listed one for me, they might do the same for you. The suit was perfect BTW and I got it in a couple days, great guy to deal with and $89.99 for a Brand New Zoot Speedzoot suit is a killer price…or at leats I think so 
Sonny
that is a GREAT PRICE. I paid 200 for mine last year. What a turd!