Here is a link to your thread on Amazon.com. They say:
"Variegated Natural Cotton Thread. 100% mercerized natural cotton in fabulous variegated shades to coordinate with the solid range of natural cotton thread. This jumbo spool is perfect for bigger projects and can be used in hand and machine sewing projects. 876 yd spool."-They don't list the weight. I would assume it is a 50 wt. I don't think I would hand quilt with it unless I used beeswax. Good Luck
http://www.amazon.com/Natural-Cotton.../dp/B00275V9MY