13-14 inch: Internal dimension is 350*250*30mm(L*W*H)can fit all macbook 13.3 inch and another brand laptop 14 inch like Surface Laptop 4/3/2/1 13.5; Dell Latitude 14; HP 14 inch Chromebook;Lenovo ThinkPad X1 Carbon; Lenovo IdeaPad 13/14
15.6 inch: Internal dimension is 410*280*30mm(L*W*H)Suitable For 15.6 Inch Laptops. Measure your laptop before you purchase the laptop sleeve to see if it fits well because everyone has different needs for the space left in the sleeve.