I'm no fan of Paint and would highly recommend you use something other than that to create graphics. There are plenty of free options with more power than MS Paint.
Paint.NET is a far better bitmap editor
Inkscape or Draw.IO are options to do vector graphics or labels.

Word is only useful if you are using those labels as artwork and either:

1. Doing a mail merge with other changeable text
2. Printing onto particular sticky label sizes and using template alignment for that product eg Avery

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Andrew Lockton
Chrysalis Design, Melbourne Australia