These envelopes are printer-friendly, so you can use your home laser or inkjet printer to address them. They are printable on both digital and offset commercial printers. No need to worry about smudging or jamming because these envelopes are made for compatibility with most printer models. BEAUTIFUL BLACK COLOR: If you want a high-quality black envelope, this is the item for you. Made from 80 lb. text weight / 32 lb. bond / 120 GSM paper stock, these envelopes are about twice as thick as printer paper. If black isn’t the color you’re looking for, we’re happy to offer these envelopes in many color options. DURABLE & RELIABLE: These envelopes make excellent invitation holders and are 5 1/4" 7 1/4" (133.35mm x 184.15mm), large enough to comfortably fit 5” x 7” paper items. Made from LUX 80 lb. Black Linen paper stock with a side seam construction, these envelopes are thick and durable, making it perfect for things like photos, letters, mailings, personal mail, or invitations.