This sturdy clear plastic letter storage satchel has movable dividers to make as many as 35 compartments of varying sizes from 1-¼″x 2″ up to 5-½″x 3″. Included are enough dividers to make 26 smaller compartments in the upper part, plus the three large compartments in the lower part. Box measures 14″ x 15″ x 2″ overall.