Here's some advice on selecting the right size-The center of the palms of my hands measure 3.5 inches. I originally bought the medium size, but they were too snug. I could get them on with some effort if my hands were bone-dry, but if my hands were the slightest bit moist, it was VERY difficult getting them on, and they were tight.So I bought the large, and they fit perfectly. Easy to get on, not too tight, not too loose.As far as durability, I bought these mostly for working on my motorcycles. I recently had to remove the forks from one of my bikes, which required me to remove the front wheel, which required me to disassemble the front brakes, and I did all this without a single tear in the gloves I was wearing.People talk about them being thin, or tearing easily, but naturally they will tear if you pull on them too hard (get the right size), or perhaps cut one with a fingernail. After all, they're made of Nitrile, not steel.Take them out of the box and store them in a ziploc bag or other airtight container to make them last longer. Exposure to the air can cause rubber to break down over time.I'm very happy with them.