Please refer to the outside dimension of the bag (length x width x thickness) before ordering.

12 inch bag: outer dimension 330x240x30mm, inner dimension: 315x230x25mm.
13.3 inch bag: outer dimension 345x240x30mm, inner dimension: 330x230x25mm.
14.1 inch bag: outer dimension 385x270x35mm, inner dimension: 365x255x30mm.
15.4 inch bag: outer dimension 390x275x35mm, inner dimension: 370x260x30mm.
15.6 inch bag: outer dimension 410x290x40mm, inner dimension: 390x280x35mm.

For Macbook new 13.3 inch, A1706, A1708, A1932, A1989, all are same size bag,
External dimension 330x240x30mm, internal dimension: 315x230x25mm.

13.3 "bag is good for macbook old air and pro 13.3 inch, it is too big for macbook new 13.3 inch
Please make a careful choice for new 13.3 inch macbook.