THE MATERIAL DRAWER
Thread structure
Six strands and 8 meters describe different quantities
The full skein length is not multiplied into more six-strand thread.
Pearl cotton is not separated like six-strand floss
A twisted non-divisible thread needs its own product record.
Keep meters, yards and the printed rounding
A nominal label pair can use rounded values.
Metallic-looking thread is not standard cotton floss
Match the exact material and structure before applying a length model.
Spool, skein and cone are package forms, not fixed lengths
A package shape should not replace an actual quantity declaration.