These Evidence Envelopes provide uniformity in size for both collection and storage of a large variety of evidence types. The use of standard envelope sizes will facilitate long-term evidence storage. Preprinted with all the pertinent information when collecting evidence at a crime scene. Evidence tape or seals should be used to ensure evidence integrity. Envelopes imprinted with black text. Custom printing available. Available in three sizes. Evidence envelopes provided in packages of 100 or in bulk packages of 500.