Neural Networks – Can I get the "image size" etc from a NetEncoder in an existing network from the repository?

I'd like to get details about the inputs used to train a network in the Net Repository, in my case, "LeNet trained on MNIST data." I can get his decoder by:

NetExtract[ NetModel["LeNet Trained on MNIST Data"] , "Input"]

but I can not figure out how to get properties like Type and ImageSize from within.