Custom Large Envelopes - 2 Sizes - (500/Box) Elevate your mailing operations with professionally printed custom large envelopes, available in two versatile sizes to match your specific needs. Each box contains 500 envelopes. These envelopes feature premium printing quality that reflects your brand identity, ensuring every piece of mail makes a strong first impression. Whether you're sending invoices, marketing materials, or important documents, custom sizing options allow you to optimize fit and presentation. Bulk ordering reduces per-unit costs while maintaining consistent branding across all outbound communications. Ideal for companies seeking reliable, cost-effective mailing solutions without compromising on quality or appearance.