I'm tall 177 cm and weight 83 kg , chest...
I'm tall 177 cm and weight 83 kg , chest 104~105----M or L size?
I'm 185 cm tall but have a similar chest size to you. My medium is perfect for me, there's space underneath for a light fleece on cold days but it's not super baggy. It may cover a bit more of your rear end compared to me.