As Time Goes By Set 2 ~ Size 12 Valdani Pearl Cotton Set of Twelve 109 Yard BallsThis set contains twelve size 12 Pearl Cotton balls, each measuring 109 yards. Beautiful hand dyed Perl Cotton from Valdani is guaranteed colorfast. The thread is 100% cotton, and works well for any embroidery, quilting, applique, crochet, punchneedle, rug hooking, or thread embellishment project. This thread is for patterns where you want a finer thread for more definition.