I did a little digging and here's what I came up with: Pyramid Mills was a family company in Gastonia, NC. In the 50s, they became a Christmas tree ornament company and in the 70s, changed names to Rauch Industries-- and in the 90s, got slammed with industrial polution charges. But I digress. It seems that the Grant Crest yarn company took over the PM yarn business, and continued the Mo Gleam line. Some of the yarn is available on eBay and is listed as 135 yds per 2 oz. Which would make it DK, or sport-to-light worsted thickness-- about 5 - 6 sts per inch. As for the size 6 needles-- if the pattern is old enough, the needle sizes may not be exactly what they are today, so I would just try to get that gauge and go from there. Fortunately they're just foot warmers and so if it isn't working, you don't have to rip out an entire sweater!