Choosing the Right Stationery Sizes for Your Wedding Suite

Your wedding invitations are more than just paper—they set the tone for your big day, offering guests a first glimpse of what’s to come. Choosing the right stationery sizes for your wedding suite ensures everything fits beautifully in the envelope, arrives safely in the mail, and looks as elegant as you’ve imagined. From the main invitation to RSVP cards, every piece should complement one another while serving its purpose.

The heart of your suite is the wedding invitation, typically 5 1/4 x 7 1/4 inches, known as A7 size. This classic format provides enough space for essential details while maintaining a polished, balanced look. If you prefer a more unique touch, square invitations (6 1/4 x 6 1/4 inches) or slim invitations (6 x 9 1/2 inches, A10) offer modern alternatives.

A response card makes it easy for guests to RSVP. The most common size is A1 (3 5/8 x 5 1/8 inches), which neatly fits into a coordinating envelope. To streamline replies, include pre-addressed and stamped RSVP envelopes or opt for a postcard-style response card using cardstock for a cost-effective, no-envelope option.

If you're providing hotel information, directions, or a wedding website, a separate details card is a great way to keep your invitation uncluttered. The standard size is A2 (4 3/8 x 5 3/4 inches), but for more text and information, A6 (4 3/4 x 6 1/2 inches) gives additional space without overwhelming the suite.

Save the dates are the first piece of wedding stationery guests receive, often mailed 6 to 8 months before the wedding. The most common sizes are A2 (4 3/8 x 5 3/4 inches) and A6 (4 3/4 x 6 1/2 inches). If you're including a photo, a postcard-style save the date offers a simple yet elegant option.

After the wedding, a handwritten thank-you note is a meaningful gesture. A1 or A2 sizes are perfect for a heartfelt message without feeling too large or too small.

Envelopes should always be 1/4 to 1/2 inch larger than their corresponding cards to allow for easy insertion. Here’s a quick guide to common envelope pairings:

5 x 7-inch invitation - Fits in a A7 (5 1/4 x 7 1/4) envelope
3 1/2 x 4 7/8-inch RSVP card - Fits in a A1 (3 5/8 x 5 1/8) envelope
4 1/4 x 5 1/2-inch details or thank-you card - Fits in a A2 (4 3/8 x 5 3/4) envelope
4 1/2 x 6 1/4-inch save the date or details card - Fits in a A6 (4 3/4 x 6 1/2) envelope

• Layering: Keep larger cards at the back and smaller ones on top for a neat, organized feel.
• Weight & Postage: Heavier paper or multiple inserts may require extra postage, so check with the post office before mailing.
• Calligraphy & Printing: Factor in envelope space if using calligraphy, custom printing, or wax seals for a refined finish.

With the right sizes, your wedding stationery will be as stunning as the celebration itself. Whether you prefer traditional elegance or modern minimalism, finding the perfect fit ensures a seamless mailing experience and a beautiful keepsake for years to come. Ready to create your dream wedding suite? Shop JAM Paper’s Wedding Shop collection of high-quality invitations, envelopes, and stationery to customize a set that reflects your style. With a variety of sizes, colors, and finishes, you’ll find everything you need to send out your wedding details in a way that feels uniquely yours. Start designing your perfect wedding suite today!