This shirt polo is in excellent vintage condition. It is a handsome vintage garment. Such great detailing - so many different knit designs Front chest button pocket. I would say it is polyester as it is light and really breathable but it may be a bit of a blend as it doesn’t seem to wrinkle. It is a beautiful light butter yellow. There is no listing size but I would say large - XL. Please see measurements below. Measurements (laying flat): Chest 46” Waistband 34” relaxed 46” extended Length 26.5” Shoulders 22” Sleeves 11” Collar 2 3/4”