You are currently browsing through Zazzle's custom Massachusetts envelopes section, where you can find a variety of Massachusetts designs for custom #9 envelopes. Measuring 3 7/8" x 8 7/8", Zazzle #9 envelopes are available for personalization or ready for purchase as is. Most Zazzle.com custom envelopes ship within 24 hrs after ordering. #9 envelopes make great reply envelopes and fit perfectly into any standard-sized business envelope. Add a special touch to any mailing with free text and images. To find other related products, visit the main massachusetts page.