Monarch Envelope - 3.90" x 7.50", B5 (JIS) - 7.17" x 10.12", DL Envelope - 4.33" x 8.66", 8.50" x 13", 3" x 5", Chou 3 Envelope - 4.72" x 9.25", L - 3.50" x 5", 5" x 7", Envelope No. 10, 8" x 10", Letter - 8.50" x 10.98", A5 - 5.83" x 8.27", C6 Envelope - 4.49" x 6.38", A4 - 8.27" x 11.69", 5.12" x 7.09", Executive - 7.24" x 10.51", 4" x 8", C5 Envelope - 6.38" x 9.02", A6 - 4.13" x 5.83", Chou 4 Envelope - 3.54" x 8.07", 6" x 8"
http://www.overstock.com/Electronics/HP-Officejet-6600-H711A-Inkjet-Multifunction-Printer-Color-Photo/6563248/product.html?recSet=a7a6084b-981e-4797-bc1b-0c166afe5d47