Antigone, I can't find a pic! I thought I had one, but it's only of my top half so you can't see much perspective. I'll take one tomorrow and post it up. xx
I think it's more the volume of the Speedy shape that makes them seem so big, as many of my bags are 40cm and I never think of them as huge.. big day bags, but not ginormous enough to worry about size. My Kors Astor Weekender is huge and I carry that as a day bag, it's 17" or 43cm. Actually I might get a pic of that too for comparison, and one of my Mulberry Euston which is exactly the same size and shape as a Speedy 30.