How Many Stamps Do I Need for a Wedding Invitation?

One of the most common questions from couples planning their wedding is: how many stamps do I need for my wedding invitations? The answer depends on weight, size, and any extra embellishments. This guide will walk you through everything you need to know to avoid postage delays or returned mail.

Step 1: Weigh Your Invitation Suite

Take one complete invitation set (outer envelope, inner envelope, invitation card, RSVP card, response envelope, tissue paper, belly band, and any direction cards) to your local post office or use a kitchen scale. Standard First-Class Mail in the US covers letters up to 1 ounce. If your suite weighs more than 1 oz, you'll need extra postage.

Step 2: Know the Current Postage Rates

As of 2026, a single Forever Stamp (currently $0.73) covers the first ounce. Each additional ounce costs $0.28. For example:

• 1 oz → 1 Forever Stamp
• 1.1–2 oz → 1 Forever Stamp + 1 Additional Ounce stamp (or two Forever Stamps)
• 2.1–3 oz → 1 Forever Stamp + 2 Additional Ounce stamps

If your invitation is square, oversized (over 6⅛" × 11½"), or has wax seals / ribbons, it may be classified as non-machinable and incur a surcharge (currently $0.44 extra).

Step 3: Choose Your Wedding Stamps

USPS offers beautiful wedding-themed Forever Stamps, including roses, lovebirds, coral motifs, and elegant calligraphy. Many couples also use vintage or floral stamps for a romantic touch. We recommend ordering 10–20% extra stamps for save-the-dates, thank-you cards, and mistakes.

Extra Tips for a Smooth Mailing

• Take a fully assembled invitation to the post office to have it hand-canceled – this prevents damage from machine sorting.
• If using wax seals, request "hand-cancel only" to avoid crushing.
• RSVP envelopes should include a stamp (unless you provide a digital RSVP option).
• Mail invitations 6–8 weeks before the wedding to ensure guests receive them on time.

Need help calculating postage? Use the USPS Postage Calculator or visit your local post office with a sample invitation. At USP0STSHOP, we offer bulk wedding stamps and discounted rates – browse our collection.