how do convert to inches when resizing of a single envelope

[Guest]

I never seem to understand the sizes stated in Word for lets say resizing a
birthday card. For instances what is a B6. I've entered the size of the
envelope in the custom setting but it never fits properly onto the envelope.
Help ...

 

[Guest]

You might want to use the "Custom" option for envelopes so you can type in
the width and height of the envelope you are using, if it is not a standard
envelope size.

This website gives help for working with envelopes in MS Word.
http://www.uwec.edu/help/Word03/workenv.htm

This website gives the name and the size of standard American envelopes
http://www.alltrace.com/envelopes.html (there are other websites out there if
you need European envelope sizes).