I'm making my wedding invitations, and the minimum size envelope I can use for the reply cards is: 140mm x 90mm. I'm having a terrible time finding white envelopes this size! Does anyone know where they are available online, or what the standard name for this size of envelope is called?

Thanks in advance.

I think this site has what you need -- LISTED -- C4 High Quality Envelopes

Wedding invitations and stationery, Envelopes (http://www.invitedto.fr/envelopes.htm)

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http://www.invitedto.fr/envelopes.htm
http://www.formal-invitations.com/envelopes.html
http://www.impressivecrafts.com/acatalog/White_Envelopes.html

Here are some sites I found on the net.I haven't used this service,I am not sure how reliable they are.