UndertowOptions class doesn't specify what many size settings represent

https://undertow.io/javadoc/2.0.x/io/undertow/UndertowOptions.html

There are a lot of options in this class which are vague and not clearly explained exactly what value is being passed in.  Namely, nearly every option ending with the word "size" such as MAX_ENTITY_SIZE.  Is this Bytes, KB, MB, etc?  

Also, many of these options don't specify what the default value is.  It would be nice to see these all updated to include that information.