For another consideration about small hooks, I recently bought some Varivas 2200 hooks sized 20. I should have taken notice that they are 4x fine wire. Since the inside diameter of 'most' hook eyes is around the same as the diameter of the wire it is made of, it looks to me that an 8x tippet would be the largest that would go through that thing! The eyes on my size 28 Tiemco and 26 Mustad hooks are a good bit larger. (sorry but I don't remember the model #'s) I will measure the above eye sizes and get those model numbers if anyone is interested.