Thread/yarn question?

[dawn]

 
Hi girls!  I have started a new project, and wondered if any of you could help me, I found a website that offers specialty thread and I would like to know if any of you would know what it is.  The site is:
http://www.threadteds.com/index_EN.htm
I am new to thread crochet and where to purchase different fibers or what to look for.  I would like to purchase in larger amount than what this site offers.  Also, is there a way to compare the fine yarn size to crochet thread size.
Thanks so much,
Dawn

[Nutty4crafts]

No clue as to the thread size.  The size I use for doilies and stuff like that is either #3, which is a thicker thread and good for beginners to use.  For others I either use a size 10 or 20 in thread.  Now size 30 is alot thinner like almost sewing thread and it is harder to use too.