Jackets are unisex/mens sizing.
Sizes run quite small.
I'm wearing the Large pictured (I usually wear a size 12) so M would fit 10, L 12, XL 14 etc
I would go 2 sizes up from your normal mens/unisex sizing.
I'm happy to do a free exchange/refund with these if it doesn't fit you.
These jackets are not lined, it's more of a driving jacket to keep the chill off.
If you're like me, I hate wearing a thick jacket in the truck and get hot quite easily so these are perfect for night time when the air is a bit chilly.