Get organized Durable portable registers give you a ready writing surface for 5 1/2 x 8 1/2″ forms, with space to store file copies. Holds up to 75 2- or 3-part forms, or 50 4-part forms.Holds up to 75 2- or 3-part forms, or 50 4-part forms.For 5 1/2 x 8 1/2 ” forms.