| Queue or topic size |Entity | <p>1, 2, 3, 4 GB or 5 GB</p><p>In the Premium SKU, and the Standard SKU with [partitioning](/azure/service-bus-messaging/service-bus-partitioning) enabled, the maximum queue or topic size is 80 GB.</p><p>Total size of all entities in a namespace can't exceed the namespace size limit documented in the next row.</p> | Defined upon creation/updation of the queue or topic. <br/><br/> Subsequent incoming messages are rejected, and an exception is received by the calling code. <p>Currently, a large message (size \> 1 MB) sent to a queue is counted twice. And, a large message (size \> 1 MB) sent to a topic is counted X + 1 times, where X is the number of subscriptions to the topic. </p>|
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