In china there are over 40-50 brands of TG protectors, majority are just package rebadged, but for the price of USD 8 (I got a few note 2, s4 and Note 3 for USD 3.5, bought them direct from china) there is nothing to complain about. The thickness range from 0.04mm to 0.02mm, and sometimes the stated thickness on the package is never true.
it was during these 2-3 months that all these TG protectors flocked the market, before then, it was like USD 10-15 USD each.
I don't have the note 2 and note 3 one anymore, gave them all away, but here is the S4 one, and if you see this brand on ebay, it's a quality product and the thickness is approximate 0.03mm, compared to the one on my phone that I've used for about a yr, this one is really thin.
someone on the S4 forum also has this one and is quite happy with it.
Samsung Galaxy Note II LTE N7105
Sony BT Controller VGP BRM1
Sony XBA 3
Sony MDR EX600
Sony MDR EX800ST