I found a Drops pattern that I would really like to make 107-26 http://garnstudio.com/lang/en/visoppskrift.php?d_nr=107&d_id=26&lang=us I am trying to figure out the weight of the yarn called for in the pattern (it is 100% cotton) http://garnstudio.com/lang/en/visgarn.php?garn=Paris so I can find a substitution locally. They don’t specify whether it is DK, worsted, etc. Is there a way to figure it out based on the info they do provide? Any help appreciated 
You can click on the yarn link ‘More about this yarn’, and the needle size given is a 5mm/8 which tells me it’s a worsted weight. So a worsted cotton should work fine.
Thanks suzeeq! I thought it might be worsted, but wasn’t 100% sure. Not very good at this end of the knitting game!
Generally you can go by the needle size given for a yarn. A 7-9 is mostly worsted, 5-6 DK, 10 and up is bulky or super bulky.