PrintWorks Professional Pre-Perforated Paper for Invoices, Statements, Gift Certificates & More - Letter - 8 1/2" x 11" - 20 lb Basis Weight - 500 / Ream - Perforated Horizontally perforated paper delivers consistent results to create high-quality prints. Letter-size paper is designed for use with all laser printers, inkjet printers, digital printers and copiers. Multipurpose design is perfect for printing invoices, billing statements, patient charts and more. Paper is perforated 3-1/2" from the bottom.