Different height for thumbnails feature image

[triplebit]

my problem is here:

http://www.triplebit.com/avada/product/%d7%a9%d7%a8%d7%a9%d7%a8%d7%aa-%d7%96%d7%94%d7%91-%d7%92%d7%95%d7%9c%d7%93%d7%a4%d7%99%d7%9c%d7%93-%d7%a2%d7%9d-%d7%90%d7%91%d7%9f-%d7%95%d7%aa%d7%9c%d7%99%d7%95%d7%9f-%d7%91%d7%9b%d7%99%d7%aa%d7%95/

Problem is that the feature image that pops up when clicking the left most thumbnail is taller than all the others.
Inspect element shows the same height for all thumbnails: 333px
Can someone explain that please?
Thx

[Paulie_D]

I think that link might be a bit fubared but, as always, a minimal Codepen.io demo is preferred to a link.

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