Our Blue Checks dress shirt has a great design that will look great year-round. Whether on its own, under a sweater, or tucked in and worn with a suit, the blue checks design can be as casual or formal as the day requires. Details Specially designed to be worn tucked in and untucked There is no pocket and no placket, for a clean, modern, and stylish design Semi-Spread Collar that works well with or without a tie Imported Fabric 100% American SUPIMA® Cotton, and 2-ply fabric, for great feel and comfort Size Chart- Alpha Sizing Conversion Alpha S M M L L XL XL Collar 14.5 15 15.5 16 16.5 17 17.5 We work off of collar sizing, so we can offer more sizes, which means a better fit for you. If you go off of alpha sizing, you can see for M, L, and XL, there are 2 options, so you can select the smaller or larger option.