Bamboo is in sheet form and sold by the pound. Each sheet measures 31.5" x 23.5" and weighs a little more than one pound. Bamboo can be processed very easily in a kitchen blender or other form of mixer if a Hollander beater is unavailable.
This bleached bamboo from China is becoming a favorite of ours. One hour of beating in a Hollander produces a super, well formed white sheet of paper. Bamboo fiber is short, so watermarks show up great.