Pink Rose Laptop Sleeve Bag Size:

12 inch bag: outer dimension 330x240x30mm, inner dimension: 315x220x25mm.
13.3 inch bag: outer dimension 345x245x30mm, inner dimension: 330x230x25mm.
14 inch bag: outer dimension 385x270x35mm, inner dimension: 365x260x30mm.
15.4 inch bag: outer dimension 390x275x35mm, inner dimension: 370x265x30mm.
15.6 inch bag: outer dimension 400x285x40mm, inner dimension: 385x270x35mm.

(12 inch bag is very big for 12 inch macbook, please order 11.6 inch bag for 12 inch macbook)

For Macbook new 13.3 inch, A1706, A1708, A1932, A1989, A2159, A2179, they are all same size bag,
Outer dimension of the bag: 330x230x35mm, inner dimension: 310x215x25mm.
Bag for Macbook A1466, it is the same size bag with the normal 13.3 inch bag.

13.3 inch bag is not good for all 13.3 inch brand laptop, such as for new 13.3 inch macbook, own thin screen frame, the outer length of the laptop is 304mm, but for old macbook 13.3 inch laptop outer length is 325mm.

The 14 inch and 15.6 inch bag does not fit all 14 and 15.6 inch brand laptops perfectly, they all need benchmark laptop length and width.

13 inch ultrabook laptop may need 12 inch bag choice.
14 inch ultrabook laptop may need 13 inch bag choice.
15.6 inch ultrabook laptop may need 14 inch bag choice.