The outer envelopes I am planning to use are square flap (A9). I would really like to use envelope liners but am only finding ones that are designated for triangular flap envelopes. Are envelope liners for square flat envelopes not made? If there is a site that makes them, could someone let me know which ones they are? I've looked on paper source and cards and pockets and only am finding triangular flap ones. If I'm missing the obvious here, I apologize in advance, I'm just a bit clueless when it comes to these things...
TIA,
Julie