Jumbo frames will only be used if the endpoint is configured to use them. the network setting is a maximum size and should be set to no more than 9416 in your case. If I look at my laptop I see the below dialogue box for the ethernet adapter:
As you can see, jumbo fames are disabled so the network max size being above will be ignored and the default MTU of 1500 will likely be set.
At a command prompt type: netsh interface ipv4 show subinterfaces
This will confirm what is set for you.