My collection is 325k bricks and about 320 sets. Most my sets are larger adult lego 18+ sets so thats why I have a high piece count but not that many sets compared to some people. Just having eiffel tower,titanic,ucs falcon,ucs AT-AT and ucs razorcrest and hogwarts castle is a huge amount of pieces. 17 of my sets are ucs starwars sets. 25 are lego icons sets which typically are larger sets too. I would say I have a large collection. But I have seen many people with 500k to over 1.5 million bricks and 1k to 3k sets post before. Wealthier people who are adult collectors have whole basements displaying lego. My collection is tiny compared to there's. Duck bricks has the largest lego collection. It's like 10k sets and over 60k minifigures. Don't know the piece count but I imagine its several million. There are very wealthy people who probably have more pieces and mocs though.