Creative Yarn Source. Sinfonia is a 6 ply sport weight 100% mercerized cotton, comes in a 218 yard 3.52 oz. skein, and 89 colors. It has a great sheen and drape for garments and it is smooth and tightly spun. It’s comparable to a size 3 thread and very similar to Tahki Stacy Charles Classic Cotton (which retails for about the same price for 1.75 oz. 108 yards). $5.55
Recommended by Annie MacHale, inkle weaver http://aspinnerweaver.blogspot.com/ 6-ply sport weight mercerized cotton. Skein = 218 yds (3.52 oz.) 89 colors. Like a size 3 thread. Similar to Tahki Stacy Charles Classic Cotton (Classic Cotton retails for $5.75 for a much smaller skein - 1.75 oz. 108 yd skein)
The article teaches beaded edge using beads on the warp threads on a rigid-heddle loom, but it would be much easier to add beads to an Inkle or card-woven band by threading your beads onto the WEFT thread instead!