You're currently searching through Zazzle's custom Block Pattern envelopes section, where you can find a variety of Block Pattern designs for custom A-6 envelopes. Measuring 4 3/4" x 6 1/2", Zazzle's A-6 envelopes are ready to be personalized or purchased as is. Most Zazzle.com custom envelopes ship within 24 hrs after ordering. A-6 envelopes are the perfect size for sending photos. Add a special touch to your mail with free text and pictures! To browse other related products, go to the main block pattern page.