x 11?.
5 in.(90 gsm), and acid free. These envelopes perform wonderfully with an assortment of writing instruments, and are perfect for sending correspondence.5? They are availabe in 2 standard mailing sizes: #6 envelopes for 6? Strathmore Writing Envelopes are beautiful natural white 25% cotton envelopes that perfectly compliment Strathmore Writing Pads.