Error message when using Avery label template in Word 2010

[HereToday]

I am trying to make Avery 5168 Labels but get this message:
"The margins, label size, and number across or down values produce a page that is larger than the label page size."
I'm not entering my own custom label sizes here - I'm selecting an Avery label from Word's own list. After selecting the Avery product I click on Details. There I can go down to page size and select Letter or Letter Landscape. Both are 8.5 x 11", but for some reason Landscape gets me the error message.
I have already set my document to Landcape in page layout thinking that might be the problem but that didn't fix the issue.
Any ideas? Thanks, H.T.

 

[Ranger4]

This Avery website may be useful for you as there is a program download there for creating Avery labels.

Avery Wizard | Microsoft Office 2013 | Mail Merge | Labelling | Avery Australia & New Zealand