Sooooooo, what you are telling me is:
In these two sets of blocks you have 8 seams each.
The longer set 'seam' is the width of a thread larger than the smaller set.
So laying 8 pieces of thread side by side is how much bigger the larger set is than the smaller set?
This was an excellent visual. It will be burned in my mind forever because you showed it to me this way.
Thank-you. All of the examples and information in this post and the responses is very helpful to me.