I'm doing my portfolio (graphic design) on Wordpress and I was wondering if you know what the dimensions (in inches or pixels) that I should use for the image of the thumbnail for my portfolio.
Is there a standard thumbnail size we should use? Or is it dependent on the theme we are using? I'm using this theme: http://demo.select-themes.com/stockholm4/three-column-gallery/ and they are all the same size boxes rather than masonry.
P.S. are we supposed to design the thumbnail image on indesign or illustrator or photoshop? does it matter? is it best to save it as jpeg (as the other images on my site are saved as jpeg) but I was wondering if we should save in another format for best quality to display as thumbnail?
Thank you!! =))