I use the same hair canvas whether I am making a 13 oz wool, 16 oz wool, or 11 oz PV, so I don't think there be much of an issue really. However tailors canvas does come in different weights, I'm inthe UK so not much use regarding suppliers but have a look at this site whihc might give you some ideas, they are the supplier I use mostly. http://www.macculloch-wallis.co.uk/C...loringCanvases