Cardinal of Canada Carter Brown Twill wool trench coat

Brand new condition! Cardinal of Canada Carter trench coat One tag says size 40T and one says 40L. I’m not familiar with what the letters mean. Dark brown color Zip closure with additional button closure Quilted lining Front side pockets Double collar Wool/polyester/viscose blend Pit to pit approx 22.5” Shoulder to shoulder hem approx 19” Length approx 38” Please ask any questions!