Hey CK I have a 21 inch bloodred and hes a small breed of corn... the bloods are alot smaller then the other corns... like the creamsicle and okeetees... (sorry about the spelling)... but my bloodred eats about 4 peach pinkys every week so I wouldnt doubt that your 18-19 inch corn will be to gulp down the peach pinkys... your littler one will probably have no problem with that size either... dont underestimate your corns... trust me they can get down alot more then you could ever think possible... just try to feed your lil snake a peach before you go and buy the 10000000 peach pinkys from rodentpro... test it out first... thats about all the advice I can give you... but I would venture to say that both your corns could get down the pinkys...