Probably you want to use this command:
"C:\Program Files (x86)\VMware\VMware Workstation\vmware-vdiskmanager.exe" -r C:\temp\sourcedisk.vmdk -t 4 C:\Temp\newdisk.vmdk
This will create a thickprosioned ESXi compatible vmdk in C:\Temp
You can then use WinSCP or Datastorebrowser to upload that vmdk to your target ESXi