The votes are in and these 10 colors were among the "Most Popular" by our customers. We think they will be YOUR most popular, too! You will love the intriguing results you get with Sulky 30 wt. Cotton Blendables Thread. A masterful blend of different colors within the same range of tone and intensity, with random, subtle color changes every 2-1/2 to 5 inches! No other thread does this! Check out our book - Fun With Sulky Blendables and Create with Confidence. Recommended Needle Size: 14/90 Quilting or Topstitch.