+| Message size for a queue, topic, or subscription entity | Entity | 256 KB for [Standard tier](../articles/service-bus-messaging/service-bus-premium-messaging.md)<br/> 100 MB for [Premium tier](../articles/service-bus-messaging/service-bus-premium-messaging.md) on AMQP, and 1 MB for Premium on HTTP and SBMP. <br /><br />The maximum size for batches is 256 KB for the Standard tier, 100 MB for Premium on AMQP, and 1 MB for Premium on HTTP and SBMP. <br /><br />The message size includes the size of properties (system and user) and the size of payload. The size of system properties varies depending on your scenario. |Incoming messages that exceed these quotas are rejected, and an exception is received by the calling code. |
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