Problem with Droplet and sizing

[Be...@adobeforums.com]

I have created a droplet that takes a pdf and converts it to .tif. I am using different sizes(width x height)of the pdf:s and I want the tif to hold the same size when it is converted. Is it possible to create a droplet that "recognize" the size and creates a tif with the same size? Or do I need to create a droplet for every different kind of size that I am going to use?

Here is my action list for my droplet:
1. Open the pdf, set to Trim box and CMYK.
2. Flatten image
3. Save as tif