If you specifically need a snug or loose fit, compare the actual size of your laptop with the inner size of the case to ensure they are smaller than the inner size. The more similar, 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 high-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 inch (not applicable to 11-inch tablets) [External Dimensions]: 31.5*22.0*1.5cm [Internal Dimensions]: 30.0*20.0*1.5cm 12.5 inch (not applicable to 12-inch Macbooks) [External Dimensions]: 33.5*23.5*1.5cm [Internal Dimensions]: 31.5*21.5*1.5cm 13 inch (Huawei, Xiaomi, and Apple 14 inch refer to 13 inch) [External Dimensions]: 35.5*25.5*1.5cm [Internal Dimensions]: 33.0*23.0*1.5cm 14 inch (screen diagonal 14 inch refers to 13 inch, Apple 16 Pro, Huawei D15) [External Dimensions]: 37.0*26.0*1.5cm [Internal Dimensions]: 35.5*24.5*1.5cm 15 inch (Macbook16 Pro choose this) [External Dimensions]: 38.0*28.0*1.5cm [Internal Dimensions]: 36.0*25.5*1.5cm 15.6 inch (15.6-inch gaming laptops refer to this) [External Dimensions]: 40.5*31.5*1.5cm [Internal Dimensions]: 38.5*28.0*1.5cm [Only internal dimensions can be installed; thickness can be installed to about 2.5cm].