CK is a brand we often hear, but there are also big CK and small CK. So what are the full names of big CK and small CK? Little CK's full name is Charles &; KEITH was founded in Singapore on 1996. The group owns shoes, bracelets, belts, purses and other products. The full name of Big CK is CALVINKLEIN, a fashion brand from America, which was founded in 1968. These two brands are often confused because of their similar abbreviations, and their sales ranges are different. Big CK is an international fashion brand, while small CK is a well-known fast brand.