Email photos in full resolution from iPhone 6 running iOS 8

iPhone 6 running iOS 8.1.3. How do I email photos with full resolution. I go to Photos, select some photos, pick Mail, then compose the email. No where in "New Message" does it give me an option to pick the resolution. Once I press send the email is sent with the photos at 1280x960.

Follow-up - For some reason the photo was less than 500KB thus the email app didn't offer an option to resize it.