Small plastic envelopes w/ adhesive backing approx 4 1/2" x 5 1/2". About 700 of each "Invoice enclosed" and "Packing List Enclosed" envelopes" as each box holds 1,000 when full.
Let me know what day you'd like to pickup, and approximate time (morning, afternoon, evening). I'll email with the address (between Davis/Teele Squares Somerville) and put on the porch for pickup.