Applicable size and model: Especially compatible with 11"-11.6" /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. -layer protection: As an inner bag, the outer fabric and neoprene layer can prevent dust, dirt chips, scratches and water splashes.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 ly protects the contents. Stylish design: The sturdy padded laptop case is ideal for travel and business, personalizing your laptop with its unique style. Please noteTo choose the appropriate size you need, please read the following instructions in the product description carefully before ordering. Product descriptionPlease choose the correct size according to the actual size of the laptopMake sure the size of your laptop is smaller than the internal size [11.81" x 8.46" x 0.79"], the more similar, the betterPlease 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 : 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 , , Lenovo, ThinkPad, , , , Surface, , etc. ACER: book 11/311 series, book Spin 11/311/511 series,Spin 1 series,TravelMate B3 series,TravelMate Spin B3 series, book 512/712/Spin 512/R 11/R 13 series ,S 5(12"), S 3(12"), S 12(12") etc. : book C series (11.6"), book Flip C series (11.6"),E series (11.6"),E series (11.6"),Vivobook Flip 12 series (11.6"), book Flip C series (12"), PRO P series (12.5"), Zen 3 series (12.5"), etc. : book 3100/11 3100/2-in-1 series (11.6 inches),Latitude 3000/5000/7000/2-in-1 series (11.6 inches), 11/2-in-1 series 11.6"), Latitude 3000/ 5000/7000 series (12.3") etc. : book 11 series, book x360 series (12"),Pro 11 x360 series,Elite series (12.3"),Stream 11 series,Pro series (12.3"),ENVY series (12.3") ,Spectre series (12.3"),Elite series (12.5"), etc. Lenovo: IdeaPad 100e/300e/500e book (11.6"), Ideapad 1 (11.6"), IdeaPad Flex 3 (11.6"), Lenovo N (11.6"), Lenovo Yoga 700 (12"), etc. MicroSoft Surface: Surface Pro series (12.3"), Surface Laptop go (12.4"), Surface Pro X (12.3"), etc. : book 3/4 series (11.6"),Tab S7+ (11"), bookseries (12.2"), 12" 2-in-1 series, book Pro (12.3"), etc. THINKPAD: ThinkPad Yoga 11e series (11.6"), ThinkPad 11e series (11.6"), ThinkPad X280 series (12.5"), ThinkPad 11e book 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.