1. A system comprising: a design manager embodied via executable instructions stored on a computer-readable storage medium, the design manager including: a request receiving engine configured to receive a request for an estimate size of a first compressed index associated with a first database index that is based on a database table; a base index engine configured to obtain a plurality of values indicating sizes of a plurality of second compressed indexes associated with a plurality of respective second database indexes other than the first database index, the second database indexes based on the database table; and a size estimate engine configured to determine the estimate size of the first compressed database index based on one or more of the plurality of values.