+Paper sizes are standardized physical dimensions for sheets of [paper](/wiki/paper). Systems like the global [ISO](/wiki/iso) 216 series (A, B, C) and regional standards like North American Letter define these precise measurements. Such conventions ensure compatibility across various applications and devices.
+## See also
+- [Printing](/wiki/printing)
+- [Document](/wiki/document)
+- [Measurement](/wiki/measurement)
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