@eeeefarm it worked - I emailed it to myself and then uploaded it from downloads on my phone, rather than the photo gallery - thanks for the advice!
You are most welcome! I figured this one out from sending pictures in email from my iPod. With my desktop I have a good graphic utility and downsize specifically to the measurements I want, but phones can be trickier. Big files are unnecessary and many sites don't allow them, also a problem sending large files on email.