i ordered a spyder jacket last year online, i got the xl which normally is pretty roomy on me. But this jacket was realllly tight. So I'd go 1 or 2 sizes big. And im 6'5 but all my other gear is xl and feels good.
The venom series stuff fits quite big, evidently, so you cannot compare it to normal Spyder attire. Wait for someone who has worn last year's Spyder Venom to tell you.