Applicable size and model: Especially compatible with 11"-11.6" MacBook/Laptop/Tablet/Notebook/Ultrabook, external size (L x W x H): 12.20" x 8.86" x 0.79", internal size (L x width x height): 11.81" x 8.46" x 0.79". Considering the ductility of the material, there may be measurement errors in the dimensions. Multi-layer protection: As an inner bag, the outer fabric and neoprene layer can prevent dust, dirt chips, scratches and water splashes. When putting it in a backpack or suitcase, the soft and fluffy inner lining prevents bumps, shaking and squeezing. Smooth zipper: The sturdy top zipper ensures that the laptop case stays closed, smooth and perfectly protects the contents. Stylish design: The sturdy padded laptop case is ideal for travel and business, personalizing your laptop with its unique style. Please note! ! ! To choose the appropriate size you need, please read the following instructions in the product description carefully before ordering. Product description Please choose the correct size according to the actual size of the laptop Make sure the size of your laptop is smaller than the internal size [11.81" x 8.46" x 0.79"], the more similar, the better! Please check the following compatible brands and models before ordering to ensure that the 11"-11.6" size protective case fits your laptop. A. If you have an 11.6-inch Apple MacBook: MacBook Air 11.6 inches (models A1370/A1465)-close-fitting, tailored fit, providing precise protection. B. If you have 11/11.6/12.3/12.4/12.5 inches Dell, HP, Lenovo, ThinkPad, Acer, Asus, Samsung, Surface, Huawei, etc. ACER: Acer Chromebook 11/311 series, Acer Chromebook Spin 11/311/511 series, Acer Spin 1 series, Acer TravelMate B3 series, Acer TravelMate Spin B3 series, Acer Chromebook 512/712/Spin 512/R 11/R 13 series , Acer Switch 5(12"), Switch 3(12"), Switch Alpha 12(12") etc. ASUS: ASUS Chromebook C series (11.6"), ASUS Chromebook Flip C series (11.6"), ASUS E series (11.6"), ASUS E series (11.6"), ASUS Vivobook Flip 12 series (11.6"), ASUS Chromebook Flip C series (12"), ASUSPRO P series (12.5"), ZenBook 3 series (12.5"), etc. Dell: Dell Chromebook 3100/11 3100/2-in-1 series (11.6 inches), Dell Latitude 3000/5000/7000/2-in-1 series (11.6 inches), Dell Inspiron 11/2-in-1 series 11.6"), Latitude 3000/ 5000/7000 series (12.3") etc. HP: HP Chromebook 11 series, HP Chromebook x360 series (12"), HP ProBook 11 x360 series, HP Elite series (12.3"), HP Stream 11 series, HP Pro series (12.3"), HP ENVY series (12.3") , HP Spectre series (12.3"), HP EliteBook series (12.5"), etc. Lenovo: IdeaPad 100e/300e/500e Chromebook Series(11.6"), Ideapad 1 Series(11.6"), IdeaPad Flex 3 Series(11.6"), Lenovo N Series(11.6"), Lenovo Yoga 700 Series(12"), etc. MicroSoft Surface: Surface Pro series (12.3"), Surface Laptop go (12.4"), Surface Pro X (12.3"), etc. SAMSUNG: Samsung Chromebook 3/4 series (11.6"), Galaxy Tab S7+ (11"), Samsung Chromebook Plus series (12.2"), Galaxy Book 12" 2-in-1 series, Chromebook Pro (12.3"), etc. THINKPAD: ThinkPad Yoga 11e series (11.6"), ThinkPad 11e series (11.6"), ThinkPad X280 series (12.5"), ThinkPad 11e Chromebook series, etc. If your laptop is not in these models, or you need to fit/loose, please compare the actual size of your laptop with the inner size of the sleeve and make sure they are smaller than the inner size, the more similar the better fit.