This is probably the best travel bag I have ever made! With a slit in the back for you to add it onto your luggage, it it big, and will keep you organized wherever you go!!!  This bag measures 13”W x 12” H x 5” D (at the bottom). 
It is loaded with pockets on the interior, and even has a divider pocket in the middle.  The exterior pockets include a slit pocket and a zipper pocket on one side, and a zipper pocket on the outside of the trolly sleeve.  (The trolly sleeve fits most suitcases.) And it has generous shoulder straps to easily carry the tote.
The bag easily holds my 13” MacBook Pro, and IPad.  As always, this bag can be customized with the pockets, and fabric. Please message me for more details….