#24 Glace Thread is a waxed cotton thread for a easier sewing experience. A popular Millinery thread. Currently available in 18 colors on 1/2 Oz. Spool. During the manufacturing process, the size and quality of the spools changed, however, the put-up is the same on all spools. UPDATE...the manufacturer of this product was sold to another group who have decided rewinding thread on a smaller put-up was not worth their time.