Anyone who has a better knowledge, feel free to correct me:
Today's large coed (36 total; 18 males max.) would closely reflect unlimited coed (36 total; unlimited males).
Today's medium coed (30 total; 8 males max.) would closely reflect large semi-limited coed (36 total; 12 males).
Today's small coed (20 total; 4 males max.) would closely reflect small limited coed (20 total; 4 males max.)
The only division from the past that does not have a division today that closely reflects it is the large limited coed (36 total; 4 males).
Also, international open coed divisions were split between small and large like they are this season. However, the small division is actually today's large (24 total; 12 males max.) while the large division doesn't exist today (36 total?; 18 males? I can't remember).
It gets confusing because the size (i.e. small & large) was known to denote the total size of the team, not reflect the number of males. It was the "limited" part that determined the number of males. So when it was announced that they were bringing the small and large international open coed divisions back again this season, people thought it meant the actual size of the team not the number of males allowed. Again(and I've mentioned this a couple of times in other threads), I wish they would name it "international open semi-limited coed" and "international open limited coed" for naming convention purposes.
*P.S.: I just listed all the coed divisions I could think of, I don't remember the chronological order in which divisions started/cease to exist.