The Blue Summit Supplies 100 Count 9” X 12” Catalog Envelopes are self-sealing envelopes perfect for packaging and shipping various items. Made in Canada, these catalog envelopes feature a secure seal to keep your mail safe and confidential. Whether you’re a business owner or individual looking for reliable packaging solutions, these envelopes provide a convenient and efficient way to send your documents and materials. With the brand’s reputation for quality and the model’s design for ease of use, these catalog envelopes are a practical choice for all your shipping needs. New.