I know you're talking specifically about RB but I've just spent a half hour browsing e-bay and am amazed at the number of bikes for sale with no frame size beyond small/medium/large. Some go into amazing degrees of detail on the sizes of everything down to the last flippin nut & bolt but NO FLIPPIN FRAME SIZE
I know it's important for everyone but, really, when you're a pint sized dwarf with the inside leg measurement of an elderly gnat, it's really
crucial to know the frame size.
1993 Cannondale Killer V - ancient & battered like its rider.
A newish Dawes road bike called Jim and a 2004 Claud Butler Cape Wrath.