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Paper size 3x4 inch is not supported on printers in the Envy Photo 7800 series.
Sample
Product Specifications for the HP ENVY Photo 7820 All-in-One Printer (K7S10D)
Paper Handling
Partial Excerpt
Media sizes supported (U.S. standard) | Letter, Legal, 4 x 5 in, 4 x 6 in, 5 x 7 in, 8 x 10 in, No. 10 envelopes |
Media sizes, custom (metric) | 97.79 x 215 to 127 x 355 mm |
Media sizes, custom (U.S. standard) | 3.85 x 8.5 to 5 x 14 in |
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References / Resources
HP Printer Home Page - References and Resources
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HP ENVY Photo 7800 All-in-One Printer series
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