What's Rubber and Purple and Shaped Like a Hand?

I'll give you a hint...

I didn't so much notice something new about the glove itself as I realized that rubber gloves come in sizes.  It seems obvious now that they would, because most people would find a baggy rubber glove inconvenient, but I figured it was a one size fits all deal.  As it happens, this particular glove is about 2 sizes too large for my hand.  It would for sure get in the way if I was doing brain surgery.