Extract an picture with a good quality ?

 Hello,

I have Fancy Product Designer 3.4.6 and WooCommerce 3.2.6.

My customer creat a product with Fancy Product Designer and he zoom it and rotate it.

I went in WooCommerce > Orders, I've clicked on "view" button, "Load in Order Viewer" button, clicked on "SINGLE ELEMENTS" button, checked "Save exported image on server", click on "Creat" blue button, clicked on the link below "Saved Images On Server" and downloaded it.

The size of the picture is too low (little) compare to the original picture.

Check the original picture and the really big dirrent of the size here : 

Could you please tell me what can I do in order to have a nice quality picture in order to print it correctly ?

Thank you very much and sorry for my English.