if you look at volume instead and approximate each bean to be a sphere
then the volume is 4ğr². So for heinz that's 5.9cm² and for the other it's 6.1cm², i.e. just over 3% bigger volume-wise, so still well short.
( corington, Thu 20 Dec 2007, 9:50, archived)

^This!
(More or less.)

I went for (1.39^3)/(1.37^3) = 1.044

I.e. the beans are probably around 4.4% bigger than Heinz.

E'en so, it's a far sight short of 50%.
( teedyay, Fri 21 Dec 2007, 0:25, archived)