Microsoft have had B & M-Series machines in preview for the past few months however they are now in general availability!
The new B-Series VMs provide a low cost option for customers who have flexible vCPU requirements. This can be particularly useful for web servers, small databases and dev/test environments where CPU utilization however there can be spikes at times. These sizes are available in East US, East US2, West US, Central US, North Central US, South Central US, North Europe, West Europe, Southeast Asia, Japan West, Australia East, Australia South East, Central India, Canada Central, Canada East, West US2, UK South, UK West and Korea Central. Microsoft will continue to add additional regions in the coming months.
M-Series VMs provide a large amount of RAM to a single VM and also up to 128 hyper-threaded vCPUs. Specifically for the SAP HANA Large Instances you can also use up to 20TB of memory on a single VM. Microsoft are launching the M-series in the following regions, with more regions available in the coming months: West US 2, East US 2, and West Europe
