By Product Manufacturer: Choose Manufacturer AcerAppleAsusDellHPKindleLenovoMicrosoftNookSamsungToshiba If your laptop is not listed, please use By Size		By Size Custom Size* Measure carefully; use decimals, not fractions. Measurements are in inches. When measuring circumference, actually measure this with a string or tape measure. The circumference measurement takes into account rounded edges your laptop might have. Inches Width Depth Height Circumference Make and model *Custom sizes are not returnable