Double window envelopes have two transparent panels — one for the return address and one for the mailing (recipient) address. They’re the standard for checks, invoices, and remittance envelopes where both addresses should show through without printing on the envelope. Getting the measurements right is essential: both address blocks on your document must align with their respective windows when the document is folded and inserted at the correct position. The interactive guide below shows exactly how to measure and align a double window envelope.
Double Window Envelope Measuring Tips
- Two separate windows: Upper window = return address; lower window = mailing (recipient) address.
- Both must align simultaneously: Folding your document correctly is critical — both address blocks must appear in their windows at the same time.
- USPS compliance: Mailing address must be fully visible through the lower window with proper clearance margins.
- Best for: Checks, invoices, remittance envelopes, billing statements, medical claims.
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