These 4-1/8" x 9-1/2" envelopes are made with diagonal seams and have a blue inside tint. They have a commercial style flap with moistenable glue seal. These #10 business envelopes provide a professional look at an economical price. Security tinting provides added privacy and confidentiality. This envelope is exactly the same as the #10 regular business envelope, but with a scurity tint. Packed in boxes of 500, 7 lbs. per Box