24# Pacesetter 9 x 12 Catalog Envelope. Designed for larger documents and presentations, our 9″ x 12″ catalog envelopes printed in black and white offer a clean, professional solution for your mailing needs. These envelopes are ideal for reports, brochures, contracts, and marketing materials that need to arrive flat and uncreased. Printed in sharp black ink on durable white stock, they deliver clear, high-contrast branding or addressing while keeping costs efficient.