2: Envelope Options A Size 10 envelope fits a sheet of paper folded in thirds. This is a standard business size. There are other sizes on the drop down list. When you click on OK, MS Word will automatically format the layout and margins of your document to fit a Size 10 business envelope. Keep going...   Exam 77-881: Microsoft Word 2010 Core 7. Performing Mail Merge Operations 7-1. Setup mail merge: Create Envelopes

Mailings -> Start Mail Merge ->Envelopes