Sofia Knit Button Down by Ciao Ciao. SOFIA BUTTON DOWN - A SOFT, LONG-FIT COTTON KNIT SHIRT FEATURING CIAO MOTIFS. MODEL IS WEARING A SIZE SMALL. MEASUREMENTS BASED OFF SIZE MEDIUM. UNDER ARM TO UNDER ARM: 59CM SHOULDER HIGH POINT TO HEM: 72CMGRADE RULE: 2.5CM DIFFERENCE BETWEEN SIZES.100% COTTON.