I got interesting question today related to NSX-T Manager sizing for VI Workload Domain (WLD), While bring up management domain, there is an option in Bring-up sheet to choose size of the NSX-T Manager.
But when we deploy VI Workload Domain (WLD) there is no option to choose NSX-T Manager Size (It will only ask for NSX-T manager name and IP details). And By Default 3 Large Size NSX-T Managers will be deployed.
If you require to deploy Medium size NSX-T Manager for VI Workload Domain (WLD), Here are steps to perform on SDDC Manager before deploying VI Workload Domain (WLD) :-
If You have already deployed VI Workload Domain (WLD) and want to change the NSX- T manager size after deployment for VI Workload Domain (WLD), you can follow the VMware NSX Docs:
Hope this will help and Keep sharing the knowledge!