The only quail I'm familiar with is California Quail, unless you're talking about the bobwhite. I don't know how much the adults weigh but I'd say they are something like 8 inches long. The chicks are little puff balls about the size of your thumb from the joint to the tip.

Once as I walking in the woods a quail flung itself into my path, flipping and flopping to get my attention. Knowing there had to be a nest nearby I stood still and looked around. About two feet from my left foot was this round nest of a dozen or so squirmng puff balls. Cuter than you can imagine.