Do kraft invitations and greeting cards come with envelopes?

Yes, with matching blank kraft envelopes: A2 for 4.25" x 5.5", A6 for 4.25" x 6", and A7 for 5" x 7" (including 5" x 7" folded cards). The 5.5" x 8.5" and 6" x 6" sizes don't come with an envelope.