Pls reference bag dimension ( length x width x thickness ) before your order it.
11-12 inch : outside : 34.0*24.0cm inside : 32.5 x 22.5cm
13 inch : outside : 36.0*26.0cm inside : 34.5 x 24.5cm
14-15 inch : outside : 40.0*29.0cm inside : 38.5 x 27.5cm
15.6 inch : outside : 42.0*31.0cm inside : 40.5 x 29.5cm
[Please Notice : Manual Measurement exisits 0.5-1cm error.]