Which type Ricordea florida or Ricordea yuma? I have seen personally Ricordea florida spread out to about 5'' across as well as yumas. The average large size R.florida is about golf ball size smaller. I have had some yumas get really big but those were I believe much older polyps then what we usually see for sale....I have some yumas right now that are about golf ball size....So the big ones are probably not the usual size, I would say about 2''-3'' inches for yumas and 1''-2'' for floridas would be the average size polyps.
my yuma is prolly like 4 inches across and it just dropped like 6 babies all under 48 watts of t5's the rics i just got are alot smaller though maybe a dollar coin and the other one is prolly 2 inches