Need help with size of some Images

Cheers!
I need help with the size of some Images.
I already took an Screenshot of some Images and marked it with a red window around the Image where i need the size of.
My English isn’t the best, so i hope you can help me anyways.
I’ll add the files, so you can take a closer look on it.

My next problem is, i wanted to work on the shop and addeded something to the Shop.
When i now used to set a picture for the Item in the Shop, my page crashed and showed the error “Bat Gateaway”. How can i fix it?
If the following Links aint working, i’ll also add an file.

Thanks for help!