A thought about Floo Powder

[Scott]

No: HPFGUIDX 6359

There is something about floo powder that has been bothering me 
lately.  Namely how exactly do they "step" into the fire.  A normal 
fireplace would certainly not be big enough to just walk into.  Some 
of the fireplaces at Hogwarts might be, but surely not the Dursely's, 
or the Weasely's.  Do they simply stick a foot in and then the rest 
of their bodies are sucked away, or do they crawl, or...?  Are 
fireplaces different in the UK?  From my experience with the UK, a 
lot of Brit. houses are built on a smaller scale than those in the 
US. Is that basically a true statement?  I know that I could never 
fit into MY fireplace, but then this IS magic...

Scott