Ok, so first of all I’m going to be casting on for this here in a few minutes. My first question is what needle size in US terms in NO. 4? Second question, when I was reading through the pattern, it said OVER in there. I’m assuming that it wants me to YO? And one last question, I promise lol. When it says to knit into the stitch twice, does it simply mean to knit into it twice, or should I knit into the front and back of the stitch. Thanks so much for the help ya’ll!!!
First, since it’s a worsted weight yarn and it doesn’t give a gauge, my guess would be a 4 mm needle–6(?) rather than a number 4 which would give you a rather tight knit.
Knit 2 into the stitch would be kfb.
Over would be YO.
Okie doke. Thanks so much for answering my questions. 
I get frustrated with patterns sometimes because they list the needle sizes in millimeters. None of my Knit Picks needles have any markings on them. If you want to find out the proper needle size, here’s a chart which will help you convert from millimeters to US sizes.
http://www.fibergypsy.com/common/needles.shtml