Now almost all Google+ users will be able to customize their profile page with a vanity URL. The profile page must be short and easy to remember web addresses that link directly to your Google+ page. Here are the requirements to get a custom URL.
1.) Profile photo required
2.) At least 10 followers
3.) The account must be at least 30 days old
If you meet these requirements, you will be able to see a “Get a custom URL” button on your Google+ page. If you do not see it yet, the option is expanding this week and will pop up when the custom URL is ready.