Leather KrafterDMC 5 Ner-o Faux Leather Jacket

Weird question, but what is the weight of this jacket? I need it for shipping reasons.

I'm about 6, 6'1 ft tall and 155 pounds. looking at my measurements i see that m size should fit me well, but should i go for l instead?

Is this a functional jacket or for cosplay

Is the faux leather jacket u.s sizes?