Okay, try doing the wraps per inch - wrap the yarn, not tightly, around a ruler and count how many strands are in an inch. Then using the wpi chart at the bottom of this page
, determine if it's an 8 or 12 ply or in between which would be be US worsted weight. But the yarn you linked to is a dk or 8 ply, so that's probably what it is.
On ravelry you can search for patterns using the weight, so that's probably your best place to look.