Visual Diagram: Exactly Where 'To' and 'From' Go on Envelopes and Boxes
By Elena Rostova
Mail handlers grade pieces by machine-readability. Letter sorting rates drop sharply when handwriting slants or when address blocks crowd the edges. The table below details exact spatial rules specified by modern carrier operations.
| Mail Piece Type | Return Address ("From") Zone | Destination ("To") Zone | Key Machine-Clearance Restriction |
|---|---|---|---|
| Standard Envelope (#10) | Top-left corner; 0.33" from top and left edges | Optical center; minimum 0.5" from all edges | Leave bottom 0.625 inches empty for sorting barcodes |
| Corrugated Shipping Box | Upper-left area of the principal package surface | Direct center of the flat top face | Do not wrap labels across corner folds or packing tape seams |
| Padded Bubble Mailer | Upper-left on the smooth, flat side | Centered horizontally on the non-closure face | Avoid textured folds that distort linear barcode scanning |
| International Parcel | Top-left; must include origin country in English | Center; destination country on bottom line in capital letters | Requires attached customs declarations alongside standard label |
Adhering to these USPS envelope standards guarantees high first-pass scan ratios. High-contrast, dark ink applied on white or pale paper delivers optimal legibility. Colored inks such as red, green, or faint metallics reflect sorting lasers poorly, often triggering machine rejection.
Elena Rostova holds a Master's degree in Public Health Journalism. She covers groundbreaking medical research, holistic wellness trends, mental health awareness, and nutritional science.
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how to write from and to address
