Here's a link to the categories list.
A few categories are duplicated for multiple different traits: Average, Female, Male, None, Large, etc.
For instance there's an average for body height and an average for breast size. They all have a 'find profiles with this' link, and it's a little broken: it uses the formula find {category} profiles which is ambiguous, because it turns up people with any kind of average, including average genital size or body build.
Those search links should instead use the formula find profiles with {trait} of {category}, so the average breast size's search link will lead to find profiles with breast size of average (here's that search in action).