Can you please remove : https://support.microsoft.com/en-us/help/4018933/the-default-size-of-windows-server-images-in-azure-is-changed-from-
https://support.microsoft.com/en-us/help/4018933/the-default-size-of-windows-server-images-in-azure-is-changed-from-128 - Remove this article . I think default size is 128.
Chris Lewis commented
Actually, we just built a lot of VMs and it appears to be Market Place Image and Region based. Talk about a royal pain in the A*** fixing this (Stop the VM, resize the OS Disk, start the VM, log on to the VM, expand the OS Partition...)