Overture is a 4 ply overdyed cotton from Rainbow Gallery. 1 ply is about the size of #5 pearl cotton. Some colors also come in Encore and Bravo – lighter weight threads. Use one ply on 18ct and 2 ply on 12-14ct. Comes on 10 yard cards. Several colors in stock – all available by special order. Refer to www.rainbowgallery.com for color card and stitching tips from Jay.