Is printer paper a4 or letter?

Is printer paper a4 or letter? What exactly is A4 paper, and why does it have a different name than the "standard" paper size?

Why the difference between A4 and Letter actually matters - ezeep

A4 Paper Size - What Size Is A4 Paper?

🔥Free Storage Bag】Letter & A4 Paper for M08F

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Thermal Printing Paper 8.5 X 11.69 A4 Size In United States - Temu

50Pcs A4 Paper Sheets Parchment Retro Paper for Certificate and Diploma 90g (Light Brown)

A4 vs Letter: What Is The Difference Between A4 And US Letter Size?

HP Ultra White Multipurpose Printer Paper, Letter, 20lb, 96-Bright, 3 Reams of 500 sheets

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What's A4 Size Paper & When to Use It

US Paper Sizes Explained. The difference between A4 and Letter.

Paper sizes: A4 vs US Letter

A4 vs Letter: What Is The Difference Between A4 And US Letter Size?

Paper Sizes, Complete Paper Size Chart