Emporio Armani
Lightweight
Unlined
Swiss dot raised textured material
Long sleeves
Button front closure
Longer length / longline
Collared
Casual fit
Shacket / sweater-jacket / sweater-blazer

Material tag removed, but it feels like cotton.

Size: 56 = US size 18 / XXL according to their online size chart
Shoulders across: 21"
Pit to pit: 23"
Length: 28"
Sleeves: 26"