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Understanding envelope sizes is crucial when preparing invitations, announcements, or any printed materials for mailing. This visual guide from Impressions Print and Mail, LLC highlights various envelope dimensions, including A10, A7, A6, A5, A4, and A2 sizes. It also provides the maximum recommended insert sizes for each envelope type, ensuring a perfect fit for your print materials. Whether you're sending invitations or business correspondence, knowing the right envelope size can make all the difference in presentation and delivery.