For the classifier, what is the size image reduce to dimensions?

[6monkeyrs]

I am building a custom classifier, and was wondering what size height and width are the image reduced to?

[6monkeyrs]

I found this , but not sure if the images are resize to a 256x256 or does it take the largest dimension and makes resizes it to 256 and proportionally scale the other dimension.

transforms.Resize(256)