I have a rather silly and very simple question. In all photography competitions, they mention that the pictures should be sized to x number of pixels on the long dimension. What does that exactly mean? For example, in one of the photography competitions, they ask for 2500px on the long dimension.

Does that mean:

If I have a picture which has dimensions 4800 x 3200 (w x h), the longest dimension is 4800 which is the width. And they want the width to be 2500 instead of 4800.

Similarly, If I have a picture which has dimensions 4000 x 6000 (w x h), the longest dimension is 6000 which is the height. And they want the height to be 2500 instead of 6000.

I have never made such conversions before. I know, the answer is pretty straight forward. I just wanted to confirm before I submit my work and don't make any stupid mistakes.

Thank you.

  • 3
    \$\begingroup\$ Exactly, 2500 pixels in the longest dimension. \$\endgroup\$
    – roetnig
    Commented Apr 6, 2018 at 20:09
  • 2
    \$\begingroup\$ Why the code formatting? \$\endgroup\$
    – user29608
    Commented Apr 7, 2018 at 0:41
  • \$\begingroup\$ What else could it mean? 🤔 \$\endgroup\$
    – osullic
    Commented Apr 7, 2018 at 10:12

2 Answers 2


Exactly. And Lightroom and some image editors will allow you to export an image with a desired value for the "long edge" (rather than for desired width or height). It keeps your resize operations much more consistent, assuming you don't do a lot of cropping.


Yup, just make sure neither the width nor the height exceed 2500px for your picture.


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