Hi OM2

In Word 2010 open a document, then click on Mailings/Labels which opens an Envelopes and Labels dialog box. Then click on Options and then on Label vendors to produce a drop down list. Then choose Avery A4/A5 and then J8160 or L8160 which is a 3 x 7 for a total of 21 labels complete with margins etc.

Hope this helps.
PedroUK