Hi,
Your HikaShop option "product page image width" is configured with "0x450".
You can see in your product page that the width of the product image is 450px width and is in the folder "/thumbnails/0x450/". This folder give some information about your current configuration.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.