Re: "250 grams (1 pound)"
Thanks, H4rm0ny! My eyes were opened to this point by a young maths genius on TV some years ago. Just as Kevin says, the right units for the job are what is needed. A kilometre is too short a distance to measure big distances, a mile is about right. I'd be happy for leagues to come back for really big distances, to be honest.
Out of interest, are any downvoters going to come back and explain their point of view?