You are browsing through Zazzle's custom envelopes section, where you can find a variety of designs for square invitation envelopes. Made specifically for Zazzle's square invites, these custom envelopes are available for personalization or purchase as is. Most Zazzle.com custom envelopes ship within 24 hrs of ordering. Add a special touch to your invites and announcements with free text and images on your square envelopes. To find other related products, visit the main page.