Save as 300dpi problem

[drslim2]

I wish to export and save the label (attached) as a jpeg or png image at 300dpi.
It needs to be 300dpi as needs to be printed. However, when I Export Jpeg or PNG and change the resolution to 300dpi, the label size increases to 1621px X 585px
How do I export it at 300pdi so that the label saved remains the same size as the original .xar file?

Thanks