Dimensions image

[laichGRA]

Can someone give me the dimensions of the image in this example?
How do I change it from the control panel?
https://apparel.mv.unitheme.net/woman/handbags-and-wallets/shoulder-bags/

[hungryweb]

1. Dimensions for image are: width: 280 - height: 422

2. To change it go here:

[laichGRA]

Thank you very much