Wind at night bamboo brush – Chinese calligraphy and painting brush, Small and Medium and Large

Pen barrel is wooden.
Nib is wolf hair.

Size:

The Small hair length: 3.9 cm | 1.5 inch
The Small pen length: 22.8 cm | 8.9 inch

The Medium hair length: 4.3 cm | 1.6 inch
The Medium pen length: 22.4 cm | 8.8 inch

The Large hair length: 4.8 cm | 1.8 inch
The Large pen length: 22.8 cm | 8.9 inch