first class postage vs standard is a comparison between two common postal services offered by USPS. First-Class Postage is a faster and more reliable option for mailing letters, small packages, and parcels that weigh up to 13 ounces. It offers delivery within 1-3 business days, depending on the destination. On the other hand, Standard Postage, now called USPS Marketing Mail, is a slower and less expensive service used primarily for bulk mail, such as catalogs and promotional materials. Standard Postage is ideal for businesses sending large volumes of mail at a lower cost, though it typically takes longer to reach its destination.