Only compatible with model A2337/A2179/A1932 (MacBook Air 13/13.3 inch retina display & touch id release 2018-2020) Please note that the 13/13.3" only refer to the diagonal length of the laptop display screen, not the length of the case or laptop. Please choose the size based on the model. NOT COMPATIBLE models as follows: - MacBook Air 13 inch model A1466/ A1369 (2010-2017 release) - MacBook Air 13.6 inch model A3113 M3/ A2681 M2 with retina display, release 2022-2024 - MacBook Pro 13 inch models A2338/ A2289/ A2251/ A2159/ A1989/ A1708/ A1706 - MacBook Pro 13 inch models A1502/ A1425 (release 2012-2015) - MacBook Pro 13 inch model A1278 (2008-2012 release with CD-ROM) Features of the Hard Shell Case: * Accurate incisions has full access to all ports and functions without removing the case. * Lightweight case, it will not bring extra weight to the laptop, easy to carry. * Designed with two rows of ventilation at the bottom, allowing safe heat dissipation. * Four anti-slip rubberized feet keeps your laptop firmly in place. * Design diversification to meet the needs and preferences of different groups. The size of the models is not exactly the same, how to choose the correct size for your macbook? The following way may help you confirm the model: 1. Turn your MacBook over. 2. The model number is located on the bottom of your MacBook, in small prints which says "Model: AXXXX" . "XXXX" are numerical numbers. 3. Look carefully at the size options and choose the same model number as your laptop. If you have any questions about our products when purchasing, you could consult our customer service by email.