Bag capacity in litres means less than a picture of what fits
A bag can have a useful-looking capacity number and still struggle with the awkward objects somebody carries. A rigid lunch box, a tall bottle or a laptop sleeve can change the whole arrangement. External dimensions do not always explain the usable opening or how much space the pockets take. What would make a bag listing easier to judge? Photos with ordinary objects, measurements of the opening or a view of the lining might be more useful than another carefully styled picture of the outside.