PEPPERLONELY Brand 20PC Empty Plastic Spools for Beading Wire Thread String 2-6/8 Inch

Will this hold 100 yard of fishing line?

I’m confused—2-6/8 inch doesn’t compute—did they forget to round down? Are they actually 2-3/4 inch, i.e., 2.75”?

How deep is the opening of the spool? I am trying to find out how many yards or feet will fit on the spool. Thank you

Will these fit 7/8" ribbon?