Avery labels can be a pain, I know! I have to deal with them a lot in my job.
I've always found it easiest to head over to the Avery website and download a template from there.
I can walk you through the steps:
Here's an example of a page with 2" labels templates for Word, Photoshop, InDesign, etc. (http://tinyurl.com/mzgwml7
You can search your specific label type by the number found on the package.
Just click on the file type you need and it will prompt you to register. I always just enter a fake name/email to get by this part. After that, your file should download.
** if the design on your labels is purely graphic - as in, you've already made a graphic (jpg perhaps) and you want to put on the labels, I would download the Photoshop or InDesign templates if you have those programs, as I find Word can be challenging with graphics.
Then, just open up the template in your desired program and it should appear on your screen, all ready to plop in your artwork.
I hope this helps!