Specifications: This InkWon thermal paper set includes 4 rolls of 8.5″ x 11″ US letter-size thermal paper. Not suitable for conventional inkjet or laser printers. No Ink, More Eco-Friendly: This thermal paper utilizes advanced thermal technology to produce sharp, smudge-free text and images without the need for ink.

Portable Printer Compatibility: Thermal paper 8.5 x 11 only suitable for letter thermal printer not for traditional inkjet or laser printer. It is easy to use the thermal paper with the corresponding paper size (8.5″×11″) printer without any compatibility issues.