Hi Jay if you have them in a FOLDER/S on your PC. You should be able to Select all photographs and then on the Left Menus, if you select e-mail you will be asked if you require them smaller or you have options.
Hope this Helps.
If you e-mail to yourself you can then save them at that size, or you should see in the FOLDER that you have open that they are now there with the ORIGINALS.
All the Best
Les