I would not reccomend that size unless you are wire weaving. I am careful to ask the size of the holes in my beads before I order. A 1mm hole will work with as big as 21g wire. I have to use 22g wire for my 4mm Swarovski bicones,that is skinny as I go for wire. I just sold a pile of beads on ebay that I bought before I started wire wrapping,they all had tiny holes,just had no use for them....