Night Drop Envelopes are 6in x 9in, made from White Wove 24# paper stock. Instructions for service customers are printed on the face of the envelope in Blue ink. Envelopes are packaged in boxes of 100 or 500. Custom Imprint of your company name / address is available. Quantity minimum for custom imprint is 500 envelopes. Non-imprinted envelopes are in stock for quick shipping. Please allow time for custom imprints.