Pls reference bag dimension ( length x width x thickness ) before your order it.
12 inch bag : Outer dimension : 303 x 223 mm. Inner dimension : 290 x 212 mm.
13.3 inch bag : Outer dimension : 338 x 258 mm. Inner dimension : 320 x 240 mm.
15 inch bag : Outer dimension : 378 x 278 mm. Inner dimension : 365 x 268 mm.