If you specifically need a tight or loose fit, compare the actual size of your laptop with the internal size of the case to ensure it is smaller than the internal size. The closer it is, the better the fit. Basic Protection: As an inner shell, the outer layer is covered with polyester fabric, and the inner layer is filled with highly elastic EPE, which can prevent dust, dirt, debris, scratches, and prevent collision, vibration, and squeezing when placed in a backpack or suitcase. Front Pocket Storage: There are extra pockets on the front, with enough space to store documents, chargers, mouse cables, mobile phones, memory cards, external hard drives, pens, etc. Comes with a dedicated small case: A dedicated small case for power adapters and mouse boxes, which is portable and slim, and easy for daily use. Warm tips: To choose the right size you need, please read the following instructions in the product carefully before ordering. Applicable sizes and models: Please note the sizes: 11 inches (not applicable to 11-inch tablets) [External dimensions]: 31.5*22.0*1.5 cm [Internal dimensions]: 30.0*20.0*1.5 cm 12.5 inches (not applicable to 12-inch Macbooks) [External dimensions]: 33.5*23.5*1.5 cm [Internal dimensions]: 31.5*21.5*1.5 cm 13 inches (Huawei, Xiaomi and Apple 14 inches refer to 13 inches) [External dimensions]: 35.5*25.5*1.5 cm [Internal dimensions]: 33.0*23.0*1.5 cm 14 inches (screen diagonal 14 inches refers to 13 inches, Apple 16 Pro, Huawei D15) [External dimensions]: 37.0*26.0*1.5 cm [Internal dimensions]: 35.5*24.5*1.5 cm 15 inches (Macbook16 Pro choose this) [External dimensions]: 38.0*28.0*1.5 cm [Internal dimensions]: 36.0*25.5*1.5 cm 15.6 inches (15.6-inch gaming computers refer to this) [External dimensions]: 40.5*31.5*1.5 cm [Internal dimensions]: 38.5*28.0*1.5 cm [Only internal dimensions can be installed; the thickness can be installed to about 2.5 cm].