Universal Crafts Foldable 12 x 12 Inch (30.5cm x 30.5cm) Paper Trimmer and Scoring Board Replacement Blades. These replacement blades work specifically with the Universal crafts foldable 12"x 12" Paper Trimmer and Scoring Board (UCTRIMSCOR), sold separately. These blades measure 2.5cm x 2.5cm. One replacement blade per pack.