Have you asked the person who sent it to you? Searching through all the label formats that Word supports (eg via Mailings>Labels>Options) to find a match could take a long time and, for all I know, it could be a custom format.
Cross-posted at: http://answers.microsoft.com/en-us/o...4-2906f4a29106
For cross-posting etiquette, please read: http://www.excelguru.ca/content.php?184