Yeah, they’re truly colossal 
When we’re really lucky, they’re U3 like this time.
Family tradition to have this as a treat when we’re all together (or some together even, these days).
I remember buying some at a fishmonger at the St Lawrence market in Toronto with my dad almost 25 years ago — no geographic constraint on the tradition
Here are pics from new year’s (the last pic is a full size dinner plate, for reference):
