Pls reference the bag outer dimension ( length x width x thickness ) before your order it. 13.3 inch bag : Outer dimension 345 x 240 x 30 mm , Inner dimension : 330 x 230 x 25 mm . 14.1 inch bag : Outer dimension 365 x 260 x 35 mm , Inner dimension : 345 x 245 x 30 mm . 15.6 inch bag : Outer dimension 390 x 275 x 40 mm , Inner dimension : 380 x 270 x 35 mm . 12 inch bag : Outer dimension 325 x 240 x 30 mm, Inner dimension : 310 x 220 x 25 mm. (12 inch bag is very big for macbook 12 inch, pls don't order it if you don't like big bag ) For Macbook New 13.3 inch, A1706, A1708, A1932, A1989, A2159, they all are same dimension bag, Bag outer dimension : 325 x 240 x 30 mm , Inner dimension : 310 x 220 x 25 mm . 13.3 inch bag is not good fit for macbook all model 13.3 inch, For macbook new 13.3 inch, own thin screen frame, the laptop outer length is just 304 mm, but for macbook old 13.3 inch, the laptop outer length is 325 mm. 13.3 inch bag is just can perfect fit for macbook old 13.3 inch ( laptop length 325 mm)