Notice: The [15"-15.4"] sleeve Only and Specially Compatible with 15.4" MacBook [A1707, A1990]. External: 37 * 26.5 * 3cm, internal: 35.5 * 25 * 2cm. If your laptop is not among these models, or you especially need a snug fit or a loose fit, please compare the actual dimensions of your laptop with the internal dimensions of the sleeve, and make sure those are smaller than the internal dimensions, the more similar, the more fit. BASIC PROTECTION: As an inner case, outer layer is covered with polyester fabric, and inner layer is padded with high resilience EPE, protects against dust dirt debris, scratches, offers protection against bumps shakes and extrusion when it's put in backpack or suitcase. FRONT POCKET STORAGE: Extra pocket in front, enough space to keeping document, charge, mouse cable, cellphone, memory cards, external hard drive, pens etc. ACCOMPANIED BY SPECIALIZED SMALL SLEEVE:Specialized small sleeve for power charger and mouse case,portable slim fit and lightweight in everyday use. WARM REMINDER: To choose the right size you need, please read the following instructions in carefully before ordering. If you have any concerns about the dimensions, please feel free to contact us. If your laptop is not among these models, or you need a snug fit/a loose fit, please compare the actual dimensions of your laptop with the internal dimensions of the sleeve, and make sure those are smaller than the internal dimensions, the more similar the more fit. package:1pc Laptop Bag.