​ Pls reference bag dimension ( length x width x thickness ) before your order it. 11.6 inch bag : Outer dimension : 315 x 220 x 30 mm. Inner dimension : 305 x 212 x 25 mm. 13.3 inch bag : Outer dimension : 345 x 240 x 35 mm. Inner dimension : 330 x 230 x 30 mm. 14.1 inch bag : Outer dimension : 370 x 265 x 40 mm. Inner dimension : 355 x 245 x 35 mm. 15.4 inch bag : Outer dimension : 375 x 270 x 40 mm. Inner dimension : 360 x 250 x 35 mm. 15.6 inch bag : Outer dimension : 415 x 275 x 40 mm. Inner dimension : 390 x 265 x 35 mm For Macbook New 13.3 inch, A1706, A1708, A1932, A1989, A2159, they all are same dimension bag, Bag outer dimension : 315 x 220 x 30 mm , Inner dimension : 305 x 212 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) 11.6 inch bag is a little big for macbook 12 inch, pls make order if you can accept big bag. Pls kindly contact with us if you cann't sure which size bag is fit for your laptop.