Powershell to list all SharePoint databases and their sizes

Get list of SharePoint databases and their sizes

Get-SPDatabase | Sort-Object disksizerequired -desc | %{write-host  "Size: $($_.disksizerequired/1mb)MB - Database: $($_.Name)"}

The result will be listed down in the below format.

Size: 5237MB - Database: SharePoint_Config

Size: 3455MB - Database: UsageDB

Size: 2261MB - Database: SharePoint_AdminContent

Size: 204MB - Database: WebAnalyticsStagerDB

Size: 172MB - Database: Sync DB

Size: 155MB - Database: SearchDB_PropertyStore

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Size: 6MB - Database: BusinessDataCatalogDB

Size: 3MB - Database: SecureStoreServiceAppDB

Size: 2MB - Database: StateServiceDB

Size: 2MB - Database: PerformancePointDB