Handi Quilter Needles Size 16/100-R Sharps Package of 10 (QM00246) Size 14/90-R. Fine fabrics such as silk Size 16/100-R. Average and invisible / monofilament thread Size 18/100-R. Tightly woven fabrics, metallic and decorative thread Size 20/125-R. Thickest thread, heaviest fabric A fresh needle can solve a vexing problem