No problem -- just replace them with nitrile (aka "non-latex")  gloves.  You can probably get them from a good drugstore or medical supply house.  I think they run about $10 for a box of 50 singles.  I've noticed that some hardware stores are starting to carry them, too.
But they do come in sizes, S, M, L & XL.  Try the latex gloves on if they're sized, and go from there.
And don't worry about not being able to use 50 -- they're useful for all kinds of things that would get your hands dirty or gooey.  Don't try to hoard them, as they do have a shelf life.  (You'll know you've reached it when they start tearing when you pull them on.)
Sue