I thought the same thing Stephen, but I also thought along Bruce's line of yellow cord. Why copy a sword and put an different than standard wrap colour on it. Thanks..
These are the measurements given.
Dimensions in cm (allow +-2mm)
Nagako with Habaki 25.5
Nagasa 62.5
Kissaki 2.5
Ha-machi 3
Tsuba 24.5
Saya 68.5