Fine high twist wool will turn your simple plain weave into a textured collapse weave. Even though it is a super fine yarn, it weaves up quickly. Can also be knitted with care.
On cones irregular sizes. 100-120g
How long? Lots!
White only on cones.
Coloured high twist yarn is available on smaller bobbins in http://www.theyarnhub.com/tiny-spools-big-yarns/