I took a few pictures of the yarn and its bobbin/spool/cone. I also took measurements. The spool is 7" tall. top is 1 7/8" dia, bottom is 3 7/8" dia, there is a outer hole that is 1 5/8" dia with the inner hole for the shaft/pin that is 7/8" dia. I hope this along with the pictures will make it make sense.