I can't tell which spoke nipple size these wheels have by looking at a picture.
If you have different spoke wrenches available, then use whichever one fits on easily but with the least play.
If you need to figure out which spoke wrench to order, I can't help you. If you want to buy one, go to a shop (probably on the 26th I guess) and bring the wheel with you so you can match the spoke wrench size to the spoke nipple size.
Or just get one of the handy spoke wrenches that includes all 3 sizes - that's what I use at home.
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"c" is not a unit that measures tire width