Eiddy-Fouw, The reasons are: Every photograph uploaded is resized 4 times: 75px wide (thumbnail); 320px wide (preview); 600px wide (which is what you see here); 800px wide (larger);
With every photograph you can see the larger version by clicking on icon (magnifying-glass and a plus sign) to the right of the red/grey heart icon.
btw: the original photograph you uploaded is not viewable on a browser but stored, explanation here: http://75.co.za/journal/article/85 (trying to minimise the damage caused by piracy).