For all our products, we recommend using a #9 double window envelope. We specifically designed all contribution statements and checks so that the church’s address and the person’s address fit perfectly into the windows on these envelopes. We based this on the envelopes sold by Forms Plus. This is the same company that sells the checks that are used in Church360°® Ledger and Shepherd’s Staff®.
Because of the wide variety of envelope sizes available and the differing placement of the windows, we do not recommend using other envelopes.