CHICWISHWomen's Classy Light Tan/Black Open Front Knit Coat Cardigan

Does chickwish consider size xl to be size 8 or 10 in usa? i'm referring to the open knit cardigan coat

How does it run and does it stretch?

Is this an oversize fit or is small big enough?

Where do I locate accessories like boots. purse to match caramel cardigan coat?