[sane-devel] legal size with Fujitsu ScanSnap S1500

[Max Spring]

I'm trying to scan legal size documents (8.5in x 14in / 216mm x 356mm) with
Fujitsu ScanSnap S1500 and scanimage 1.0.23git:

   $ scanimage --resolution 300 --page-width 216 --page-height 356 >img.pnm
   scanimage: rounded value of page-width from 216 to 215.999
   scanimage: rounded value of page-height from 356 to 355.999

The result is unfortunately just 11in / 279mm tall:

   $ identify img.png
   img.png PNM 2544x3300 2544x3300+0+0 1-bit Bilevel DirectClass 1.049MB 0.020u 0:00.029

The scanner is supposedly able to scan legal size.

What can I do?

Thanks!
-Max