5 7/8 x 12 Envelopes

Open-end construction defines this envelope size. This collection uses 28 lb paper stock. The long business profile is useful for documents and forms that need more vertical space than standard correspondence envelopes.

The right balance of appearance, durability, and handling comes from choosing among different flap constructions and paper weights. Standard paper construction keeps the longer #16 profile practical for routine business documents and office distribution. The available constructions make it easier to choose between standard correspondence, long-form documents, and more durable mailing needs.

#16 envelopes are suited to invoices, statements, payments, notices, checks, reply mail, forms, and routine office correspondence. Long open-end envelopes support accounting teams, schools, nonprofits, healthcare offices, administrative departments, and businesses that send recurring mail. For departments that use long forms regularly, standardizing the envelope style can simplify replenishment and internal supply planning.