We are selling all version of XD design bags.
First Generation, The back and Grey color is the bobby version. The size mainly is 15.6 inch, it can use for 14 inch or 15.6 inch laptops.
Second Generation, The dark blue, sky blue, yellow, light green color is the bobby compact version, which is mainly suitable for 14 inch laptops.
The Third Version(Lastest Version), The black suite case is the bobby bizz version, which is super big and suitable for all type of laptops, max can fit for the 17 inch laptop.
The difference between bobby and bobby compact is below, check out the vedio. Thanks.