The quality of the belt comes down to the quality of the buckle/lever and leather. Crain, Safe USA and Inzer belts are guaranteed forever- that says something about their quality. 10mm is thick enough for most. A 13mm is pretty hardcore and takes a while to break in. I sell Inzer gear- but this has nothing to do with my recommendation. If you want a quality belt go with Crain or Safe USA or Inzer. Ricky Dale Crain sells Crain belts on ebay for around $US79 plus shipping from USA. Safe is about the same. I sell Inzer 10mm forever belts for $AUD100.