A family of Microsoft word processing software products for creating web, email, and print documents.
Go to the Mailings tab of the ribbon and then in the Create section, click on Labels and then on Options and make sure that the Page printers radio button is checked and then from the Label Vendors drop down, select Avery US Letter and then scroll down to need the bottom of the Product Number list and you will find 8387 Postcards. Select it and then click on OK and then probably New Document to get a page that contains a 2 x 2 table with cells the dimensions of those labels.
In Word, labels are just tables with fixed cell dimensions. Therefore, if you want more than one page, just press the tab key when in the last cell (of the table) on the page.