Thanks. I believe my long-ago source said that 500 square feet is an American thing. However, I am inclined to agree with you: size of persons matters. How much room do infants/toddlers need? Hubby and I live in about 1,340 square feet, 3BR/2BA. “Great room” is huge, BRs are small. Saving grace is that we have a HUMONGOUS two-story garage, half of which is filled with about five people’s “can you save this for me?” stuff. In other words, we don’t need one of the BRs as a junk room (although one kinda comes close!). Our kid has her own BR and comes down for college breaks and has her own room…even then, it’s not too crowded.