Download the Avery wizard and print using a standard printer
ETA runs through Word
I think that the label print option is native in Word.
Tools - Letters and Mailings - Envelopes and Labels
You set the type of label that you want. It knows all the standard ones. I print on Avery L7160 21 labels per sheet, format 63.5 x 38.1 mm.
It will suggest the address if it can find it in the document but you can paste in anything.
You can select a whole sheet of identical labels or a single label.
My hint is to print on the last label first, and go up the page. That way, when you have peeled off the lower labels, the page has still got a firm leading edge to go into the printer, not just the flimsy backing sheet. It is also a good idea to write the direction on the back of the page so that you remember how to reload it later.