Each item is Bella + Canvas, Anvil or a similar American-made brand, sizing guides are below:Size ChartWomenShirtsXXSXSSMLXL2XLSize0000-24-68-1012-1416-18Chest (inches)26-2828-3030-3232-3436-3840-4244-46Waist (inches)20-2223-2425-2627-2830-3233-3536-38Chest: Measure under arms around the fullest part of the bust. Be sure to keep tape level across back and comfortably loose.Waist: Measure around natural waist with a measuring tape. This sizing chart is approximate to support your selection.Size ChartMen/UnisexShirtsXXSXSSMLXL2XL3XLChest (inches)29-3130-3234-3638-4042-4446-4848-5050-52Waist (inches)27-2928-3030-3232-3333-3436-3840-4244-48Chest: Measure under arms around the fullest part of the chest. Be sure to keep tape level across back and comfortably loose.Waist: Measure around natural waist with a measuring tape. This sizing chart is approximate.In our opinion, these products are fitted and runs small, so please take this into consideration when purchasing. The guides above will assist you on getting the right fit for you.