19,20 и 21годы одинаковые
The MacBook Air (M1, 2020)’s dimensions of 0.16–0.63 x 11.97 x 8.36 inches (0.41–1.61 x 30.41 x 21.24cm) and weight of 2.8 pounds (1.29kg) are exactly the same as those of both the MacBook Air (2020) and the 2019 model, and virtually the same as those of the 2018 Air, which is a bit lighter.