Valdani Pearl Cotton Ball Size 12 109yd Ocean Waves. Perle Cotton Size 12. Ocean Waves - collection of blues and watery colors. This overdyed thread is a highly decorative, double twisted, indivisible long staple 100 percent cotton thread that has been double-dyed to achieve an amazing depth and profusion to colors. This sampler pack contains 12 solid and variegated colored balls. Size 12. Excellent for Wool Applique, Stitching, Punch Needle, Hand Quilting, Hardanger. CHK-OWPC12SMPLR