Keep Member’s Mark #10, single window, security envelopes on hand for mailing important documents with confidence. The 500 box count is a plentiful supply for home or business use and keeps purchasing at a minimum. These #10 envelopes measure 4-1/8" x 9-1/2" to hold standard size documents snugly. The transparent window feature allows name and address to be viewed through the envelope and avoids hand addressing. Prying eyes are kept at bay with a premium interior security tint for maximum privacy. Envelopes are fully gummed to create a secure seal and to assure contents arrive intact. Member’s Mark security, #10 single window envelopes are the ideal carrier for important documents, checks or other confidential correspondence.