[Zubersoft]

MobileSheets should be saving the last used stamp size to the preference file and reusing that the next time you access the stamp tool. I justed tested this by changing the stamp tool size to 40, placed a stamp, closed MobileSheets entirely, restarted it, entered the annotation editor, checked the stamp tool settings, and it's set to 40. If this is not working for you, it most likely means something is wrong with the file containing the annotation settings. If you created your favorites with a stamp tool size of 6, you need to delete those favorites, change the stamp tool size to what you want, then add the favorite again.

Mike