I am new on this. I need to buy pictures for my website from Photodune. The question is which quality to purchase that would give the optimal trade off between quality and download speed on the viewer device (desktop and mobile).
I am using Themeforest X – Ethos demo 1
Extra Small 574 x 348 (0.2MP) $1 Small 995 x 603 (0.6MP) $2 Medium 1816 x 1101 (2.0MP) $3 Large 3145 x 1907 (6.0MP) $5 Extra Large 5126 x 3108 (15.9MP) $7
Why not have both? Purchase the size you NEED and save for web in photoshop, you can lower the “quality” quite a bit depending on the image without losing any real quality.
Using a CDN as well as pre-setting the width and height of your image will make them load quite a bit faster aswell.