Is this a dayhike? If so, are you thinking of stashing them once you are below the snow?
If you stash them somewhere, then weight and size matters very little. Four points, microspikes, those rubber frames with metal springs around the rubber - anything would work pretty well.
More so, send one person to scout it before leaving your car. Every winter (of 3) that I've done it, there's some ice / snow, but not so much and not so slick that I bothered with anything.
If you can scout it the day prior, take whatever you have and if it is really icey, then procure some on the South Rim.
>"But if you slip on some of the Grand Canyon trails, you have much further to fall."
Not Really. Not on the Bright Angel Trail. Yeah, you could slip and bang yourself on a rock, but you're not going to tumble down a cliff. The South Kaibab is more exposed and there are a few stretches with more exposure.