Amazon MSK provides additional EC2 M5 broker sizes for more flexibility and cost optimization
You can now create Amazon Managed Streaming for Apache Kafka (Amazon MSK) clusters using kafka.m5.8xlarge and kafka.m5.16xlarge brokers. These new broker types give customers additional options to optimize the cost and performance of high volume streaming workloads on Amazon MSK. All Amazon MSK features apply to clusters with kafka.m5.8xlarge and kafka.m5.16xlarge brokers, including two and three availability zone deployments, encryption in transit and at rest, and each cluster is paired with a highly available, fully managed Apache ZooKeeper cluster at no additional cost.
Source:: Amazon AWS