Originally Posted by
ligia
Wow, thereīs something here I have to learn:
I count 1-2-3-4 (1/2")- 5-6-
7-8 (-->1") markers.
Isnīt the 7/8 the last marker before the next full inch (the 8th) ?

You are starting with 0", then 1/8, 2/8 or 1/4, 3/8, 4/8 or 1/2, 5/8, 6/8 or 3/4, 7/8, then 1". You misspoke saying marks between inch marks, forgetting to count the first mark.