In a season replete with clothing catalogs and campaign flyers, the biggest item stuffed in mailboxes this fall may be the Nov. 8 statewide voter guide, coming in at a record-setting 224 pages. The information booklet covers all 17 statewide ballot propositions, a document that election officials believe is the most voluminous election guide in California history. And it hasn’t come cheap: The total cost for printing and mailing, done in Sacramento and taking seven weeks to complete, will come close to $15 million. “It could have been worse,” said Kim Alexander, president of the nonpartisan California Voter Foundation.