Marilyn,
Glad I could help you with my mistake!    Yes, I used size 0000 (4/0) needles to knit I-cord out of size 10 cotton.  It was tedious to the max...though I felt the needles made a tight enough stitch.  Knit two inches of that thing, then found something better for the purpose, so never bothered finishing!  (Worse, I was knitting with black cotton that had a gold metallic thread wrapped around it.  The gold thread did not behave at any time.  Trying to work with the black was VERY difficult, because it was so hard to see.)
Melanie  (known to the cat as "Rowr" or "Rowr Rowr") =^.^=

Melanie,
I have some size 000 needles, but I haven't tried to use them. I hadn't taken the time to think about what size yarn/thread I would need.   Thank you for telling me/us what didn't work.  That will save me some time if or when I decide to try out my needles.  .....If I can remember it that long! 
Marilyn

Charlene,
Thank you!  LOL, I'm not sure where I was in the pattern or if I can find it again.  I think I can locate the knitting, at least!  Hopefully it won't be hard to find the pattern or figure out the row (can you imagine counting the rows on that?).  Hee hee, you're so right about the "execution," sigh.  That was one reason I abandoned it...got too frustrating!
Melanie  (known to the cat as "Rowr" or "Rowr Rowr") =^.^=

Isn't odd how things look so cool in the minds eye but the execution (with those little stabby needles) is a whole nuther planet?  I do hope this turns out so well that it's worth your effort.  So far it looks very cute.
Toodles
Charlene