A shirt is a kind of cloth which is made to cover your upper body. In North America, shirts can mean T-shirts, polo shirts, etc. In Britain, a shirt has a collar, sleeves with cuffs and split in half with buttons on one side. (North Americans would call this a "dress shirt", a specific type of "collared shirt"). Some shirts have sleeves, that cover your arms. T-shirts are a type of shirt that has shorter sleeves. These sleeves cover the shoulders. Shirts that do not have sleeves are called "sleeveless".