I bought an Opinel Carbon just last week. I got the size 9. It lives in my work laptop bag and comes with me every day. I also got the Opinel non-Carbon (stainless?) size 7 for my wife, and she has been using it a lot to open packages, food cartons, etc. Its handy just to have a sharp knife at hand when you need it. The Opinel models are very good for the price.