High quality, bright white printer labels are environmentally-friendly. Face sheet is made process chlorine-free PCF. Adhesive meets the USPS specification USPS-2-1238 in order for it to be safely recycled. Compatible with both desktop laser and inkjet printers. Acid-free and lignin-free. Safe for archiving and will not turn yellow. Label Size - text: 8 1/2 x 11 Label Colors: White Machine Compatibility: Laser Printers Inkjet Printers Adhesive: Self-Adhesive. Green : Processed Chlorine-Free PCF