I will mail this week too. I looked at heavy duty 9 x 6 clasp envelopes at office max, WAY expensive, then much cheaper ones at the dollar store but dubious quality. finally noticed office max has 8.75 x 5.75 Kraft paper greeting card envelopes (no clasp) at a reasonable price, 25 for $5. They are called A9 size, as someone had mentioned here. The slightly smaller size is a better fit for 6 stacks of 8 so I think it'll be perfect!
Janice, I am seriously thinking about the CC quilt, too many projects going on now to start it yet but I've started cutting 1.5 inch squares. Let me know you guys if my squares are not up to snuff.