Welcome to the store! APPLICABLE SIZE & MODEL: Specifically compatible with 11" MacBook/Laptop/Tablet/Notebook/Ultrabook. Outer Dimensions (L x W x H): 12.20" x 8.86" x 0.79", Inner Dimensions (L x W x H): 11.81" x 8.46" x 0.79". Please note that there might be measurement errors due to material ductility. BASIC PROTECTION: As an inner sleeve, the outer layer is covered with polyester fabric, and the inner layer is padded with high-elastic EPE. It protects against dust, dirt, debris, and scratches, offering protection from bumps, shakes, and extrusion when placed in a backpack or suitcase. SMOOTH ZIPPER: A strong top zipper ensures the laptop sleeve stays closed smoothly, perfectly protecting the contents inside. INCLUDES SPECIALIZED SMALL POCKET: A specialized small pocket for your power charger and mouse, offering a portable, slim fit and lightweight convenience for everyday use. Please pay attention!! To select the correct size you need, please carefully read the following product instructions before ordering. Your satisfaction is our top priority. We will provide you with the best service. If you encounter any issues after receiving the product, such as damage or incorrect quantity, please contact us immediately, and we will provide you with the best solution!