Back to Paris for my 6th visit in 5 years (really - is there any place else in the world worth a yearly visit? Don't answer that just now, please). Anyway, I adore oysters and eat them voraciously in Paris, but I never know what the numbers mean. What is the difference between a #2 and a #3? Is it a size thing? Also, if you have a favorite oyster-slurping haunt, I would love to know about it. I'm staying in the 6th, but will travel.
Many thanks in advance!