（Note：To ensure that the product is suitable for a laptop, we recommend that you measure the size of the laptop (not the diagonal) and compare it to the internal dimensions of the product before purchasing.）

Outside Dimensions:
11-12Inch    (High)320mm, (Wide)210mm.
12.5-13Inch (High)350mm, (Wide)250mm.
14-15.4Inch (High)380mm, (Wide)270mm.

Inside Dimensions:
11-12Inch    (High)300mm, (Wide)190mm.
12.5-13Inch (High)325mm, (Wide)230mm.
14-15.4Inch (High)360mm, (Wide)250mm.

Tips:
☞ This laptop bag is not design for a special mode,therefore,please confirm your laptop dimension before taking orders.
☞ This item is not limited to the models and brand provided, if you know the size of your computer, you can also choose the appropriate option
☞ Due to the manual measurement ,there might have 1-2% error,pls DON NOT take orders if you mind this,Thank you!

Compatible Models:
For Microsoft Surface Pro 3 12"
For Microsoft Surface Pro X 13"
For Microsoft Surface Pro 7 12.3"
For Microsoft Surface Pro 7+12.3"
For Microsoft Surface Pro 6 12.3"
For Microsoft Surface Pro 4 12.3"
For Microsoft Surface Pro 12.3"
For Microsoft Surface Pro 2 10.6"
For Microsoft Surface GO 10"
For Microsoft Surface GO 2 10.5"
For Microsoft Surface Book 2 15"
For Microsoft Surface Book 2 13.5"
For Microsoft Surface Book 3 13.5"
For Microsoft Surface Book 3 15"
For Microsoft Surface Book 13.5"
For Microsoft Surface 3 15"
For Microsoft Surface Laptop 2 13.5"
For Microsoft Surface Laptop 3 15"
For Microsoft Surface Laptop 4 13.5"
For Microsoft Surface Laptop 4 15"
For Microsoft Surface Laptop GO 12.4"