Okay - the netting arrived today. Didn't unroll and measure the dimensions, just weighed it: 15.20 oz. Which works out to 0.9 oz/sq yd if the advertised size is accurate.
I think that Thru Hiker nano-seeum worked out to 0.8 or 0.7 oz/sq yd.
Also, in comparing this stuff to nano-seeum, the holes are about twice as big.
So I don't really really think the stuff I got which was stated to be noseeum, is really noseeum. It is mosquito netting, but definitely not noseeum. That is both a pro and a con. If you don't need noseeum, then this stuff allows more air to circulate. If you need noseeum, then this stuff will not work in my opinion.
I have contacted the ebay seller about returning and since it is not as advertised, I have asked him to return the purchase price and the S&H and the return shipping. We'll see.