These are the packing slip envelopes that everyone asks for. At 4.5 x 6 inches, they are slightly wider and longer than many similar products. This makes folding and inserting a standard 8.5 x 11 sheet much easier and more professional in appearance. See our other listings for packs of 25 and packs of 100 of this same item. Please email your questions. Worldwide shipping available on everything we sell. Credit and debit cards gladly accepted through Pay Pal at checkout.