The Lindeberg belts due run true to size for the most part. In other words, as far as the conversions are concerned, a 90 is indeed a 32. The only problem I've run into is that the belts can often vary by size depending on where they're manufactored. Not all the belts are made in the same place, so a 90 produced in Stockholm may measure different than one of the belts that is produced in Italy. Also, be careful who you're buying from on eBay; a lot of those belts are fake. If you want to tell me who the seller is I can tell you as best I can whether or not I know if they're selling fake belts.