Does anybody know the width of a topic page?

[leafbug]

I'm not too sure how to word this, but does anyone know what the width of a topic page, as in how many pixels wide it is? Like,the white bit where the text is. I want to know because I'm thinking of making an art shop in exchange for pets/ C$ and I want to have an image at the top of the topic page, but I don't know how wide I should make it. I tried my best to explain what I mean.

[Aaron✦]

It depends on the resolution of the device being used. For example for me on Chrome, Windows 10, 1920x1080 monitor the width is 763px. The minimum width is 530 pixels and the max width is 740. (:

[leafbug]

Oh, thanks!