Composition: Sustainable PU leather incredibly thin and elegant design MacBook 1:1 molded design Magnetized foil-covered flap Note: The smaller 13.3" Air size is for Macbooks produced before 2018, while the larger 13.3" 336*228mm New 13" is for Macbooks produced after 2018. 13.3 air: 352 x 240 mm 15.4": 378 x 254 mm 16": 388 x 255 mm 16.2 cm (39.3 * 27.8 * 2 in) Inches: 14.2 (35*25.5*2 cm)