I agree with the guys above who don't wear gloves for sharpening, and with the guys who said they wouldn't insult their friend by buying him gloves if he doesn't use them or see the need for them.
But, to answer the OP's question, I would go with West Chester brand A2 cut resistant gloves. They're available from Lowe's and similar places for under $10 a pair. I don't wear them while sharpening, but they have been the best work glove I have tried for tree/chainsaw work. Comfortable, good grip, not bulky, cheap so I keep a pair in every vehicle, bag, etc., and they offer some level of cut/abrasion protection. It's probably not going to give much protection from a full-throttle chainsaw mishap, but it's good for brushing against a chain that's not running, getting the saws in/out of vehicles, etc. Good dexterity for rigging, tying knots, and things.
This brand also offers higher levels of cut protection, as well.
The levels indicate how many grams of cutting load a glove can withstand from a sharp blade before being penetrated. (from Google)
- A1: 200 - 499 grams.
- A2: 500 - 999 grams.
- A3: 1000 - 1499 grams.
- A4: 1500 - 2199 grams.
- A5: 2200 - 2999 grams.
- A6: 3000 - 3999 grams.
- A7: 4000 - 4999 grams.
- A8: 5000 - 5999 grams.
