1) From the Projects screen, tap the Project you wish to share to go to it's Summary screen.
2) Tap "Share Report" to generate and preview your report.
3) Tap the icon in the far top right of the screen to show the Export options available.
4) Next to the option to "Email" to email your Report, you will see the file size of the PDF.
Note: Reports that are 20MB or larger can't be sent by email. You will need to share reports of this size using an alternative method to email.