I modified a different pattern to work better some of the rows/round were kind of confusing so I changed them to something else. I also gave a different way to make it, if you follow the original you get a mask that kind of looks like a wrestler mask and it looks kind of funny I changed it so that the back is not like that.
You can use a bigger or smaller hook to make this the original pattern asked to use a 6mm hook and I used a 4mm hook to make mine which is ok for me because I have a small head. I wrote in the pattern to use a 5mm hook.
You will need a ball of white yarn and about half a ball of black I do not know the total amount that you will need though this is just a estimate