Gutermann replied, and very quickly, to my inquiry. This was their recommendation...
<big>COTTON 50</big>
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[TD]Thickness: No. 85
Fiber Content: Mercerized cotton
Yardage: European style spool (100 m/110 yds, 250 m/274 yds, 800 m/876 yds)
Cone (1829 m/2000 yds, 1371 m/1500 yds)
Shades: European style spool 100 m (158 colors), 250 m (45 colors), 800 m (40 colors)
Cone 1829 m (32 colors), 1371 m (12 variegated colors)
Recommended Needle Size: 70/10 and 90/14
Uses: Machine quilting, long arm quilting, piecing, appliqué, sewing, buttonholes, ornamental stitches, decorative seams.
Benefits: Natural luster, low lint, strong, soft and smooth.
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