Here are the thumbnails for a six page sequence. These thumbnails measure 2 inches by 3 inches, which I blow up to fit in a 7.5 inch by 11.25 area for my original pencil pages. I then scan the cleaned up penciled pages as jpegs, adjusting the contrast to get the darkest line...which then gives my drawings an "inked" feeling.
Note that I lay out the caption boxes and dialog balloons at this earliest stage, so that I can incorporate them into the layout for posing. I'll put in the lettering per "A", "B", etc.