Photo Resize is a simple sharing extension for Android which helps you send photos via email or messaging more quickly. It creates a temporary smaller version of your photo before you send it so that you don’t have to send the full couple of megabytes of a 8MP photo via email.
You can find and follow Photo Resize on Google+.
The extension can be found on the Google Play by clicking the following link:
The following screenshots show Photo-Resize displaying multiple picture size choices with a file size preview: