Large size : 48cm*31cm*17cm,fit 15.6 inch laptop
Middle size : 43cm*26cm*12cm,fit 13 inch laptop
1 Inch = 2.54CM; 1 CM = 0.39 Inch.
Please allow 1-3cm (0.4~1.18") differences due to manual measurement, thanks.
Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.
About External USB Charge Computer Backpacks: