Serious question, lightly asked

[JIMRPT@AOL.COM]

Et Al;
 One of the most common descriptions of grands is the term "baby grand". We 
say it, salesmen say it, customers say it, manufacturers don't often say it 
though :-)

1. Where did/does the name come from?
2. What does/did it mean?
3. Were/are Wurlitzer Butterfly and Kimball LaPetite "baby grands"?
4. Is a five foot grand a "baby grand".
5. Is a seven foot grand a "baby grand"?
6. At what size is a grand no longer a "baby"?
Jim Bryant (FL)