These booklets are printed, saddle stapled (two staples on the spine), then folded, then trimmed. The sizes showing are the “finished size”, the size after the folding is done. Therefore a 5.5″ x 8.5″ booklet opens up to be 11″ x 8.5″ …. and a 8.5″ x 11″ booklet opens up to be 17″ x 11″. For booklet orders we suggest you send your files directly to firstname.lastname@example.org, and request pricing on the stock and quantity of your choice.