The Ultimate Postcard Size and Dimensions Guide 

Postcards have stood the test of time as versatile tools for both personal and professional communication. Whether you’re sending out Invitations, Product Care Cards or full direct mail marketing campaigns, Postcards are a charming way to deliver a message. But before you start designing your Postcard, one crucial question comes to mind: what size should it be? 

This guide will break down everything you need to know about Postcard sizes, dimensions and how to customise them to fit your needs. From standard sizes like A6 to creative shapes, we’ll cover it all, so you can craft the postcard that suits your purpose perfectly. 

Image Credit – Abby Sumner Design

What is a Postcard? 

A Postcard is a flat, single piece card typically made from paper or card. It’s main purpose is to carry a message or design on one side, with space for an address and a stamp on the other. Postcards are still widely used for personal communication, such as Thank You Cards and Save the Dates, as well as professional purposes, including event promotion and direct mail campaigns. 

The appeal of Postcards lies in their simplicity and versatility. They’re easy to design, print, and distribute while packing a punch when it comes to capturing attention. 

What Size is a Postcard? 

While the standard Postcard size is A6 (148mm x 105mm), you’re not limited to this option. Today, Postcards come in various sizes and shapes to cater to different needs and creative designs. 

Below, we’ll explore the most popular Postcard sizes, dimensions, and specific use cases. 

A5 Postcard Size 

A5 Postcard Dimensions

• 148mm x 210mm
• 14.8cm x 21cm
• 5.83inch x 8.27inch

A5 Postcards are larger than the traditional A6 size, making them ideal for designs that require more space. This size works perfectly for promotional materials such as event details, menus or product inserts. 

Best used for: 

• Event Programmes 
• Menu Cards 
• Product Care Cards

Image Credit – Zenoté Handmade

A6 Postcard Size 

A6 Postcard Dimensions:

• 105mm x 148mm
• 10.5cm x 14.8cm
• 4.13inch x 5.83inch

The classic A6 Postcard is the most commonly used size and a go-to option for personal messages, invitations, and marketing campaigns. Its compact dimensions make it affordable to print and mail while providing enough space for eye-catching designs. 

Best used for: 

• Save the Dates
• Thank You Cards
• Direct Mail Campaigns 

Image Credit – Printed.com

A7 Postcard Size 

A7 Postcard Dimensions:

• 105mm x 74mm
• 10.5cm x 7.4cm
• 2.9inch x 4.13inch

A7 Postcards are the smallest size widely used. They’re great for minimalistic designs or when budget constraints limit printing options. Despite their petite dimensions, they can still pack a creative punch! 

Best used for: 

• Motivation Cards 
• Compact Event and Activity Cards 
• Packaging Inserts 

Image Credit – MariamMakesStuff

DL Postcard Size 

DL Postcard Dimensions:

• 99mm x 210mm
• 9.9cm x 21cm
• 3.9inch x 8.27inch

The DL size may be less traditional, but it offers a sleek and modern design perfect for businesses. Its long, thin design stands out among standard Postcards. 

Best used for: 

• Flyers for events 
• Restaurant tasting notes 
• Seasonal offers or promotions 

Image Credit – Bare Bones Chocolate 

Square Postcard Sizes 

Square Postcards are a trendy, non-traditional option perfect for standing out. These come in two common sizes, providing flexibility in design. 

• 105mm x 105mm – Compact and budget-friendly, ideal for smaller designs or promotional inserts. 
• 148mm x 148mm – Adds a bit more space for creative designs while maintaining a unique square look. 

Best used for: 

• Creative artsy Invitations 
• Positive Affirmation Cards
• Social media giveaways 

Image Credit – AIM Studio Co.

Creative Shapes 

Why settle for rectangles or squares when you can truly make your Postcards stand out with creative shapes? 

Arched Postcards 

Customisable with options like upper arches, lower arches, or double arches, these Postcards are perfect for modern designs, especially for weddings and high-end events. 

Pebble Shapes 

Organic and free-form, these shapes evoke a relaxed, creative vibe. Perfect for artistic brands or casual events. 

Wavy Postcards 

Add a playful twist with wavy-edged Postcards. Excellent for bold, unconventional designs and promotional campaigns. 

Circular Postcards 

Round Postcards instantly grab attention. They are fun, approachable, and ideal for menus, coasters, or unique invites. 

Image Credit – Printed.com

Other Common FAQs 

What Are the Most Popular Papers for Postcards? 

The most popular paper types for Postcards include: 

• Uncoated 350gsm – Provides a natural and textured feel. 
• Tintoretto Gesso 300gsm – Offers a high-quality, artistic finish. 
• Silk 350gsm – Features a smooth, premium finish perfect for vibrant colours. 

Recycled alternatives are also gaining popularity as eco-friendly options. 

What Are the Most Popular Shapes? 

While traditional rectangles dominate the market, square Postcards (105mm x 105mm or 148mm x 148mm) and creative shapes like circles and arches are growing in popularity. These unique formats are ideal for brands looking to stand out. 

Can I Add Lamination to My Postcards? 

Yes, lamination is a fantastic way to enhance your Postcard’s durability and appearance. Popular options include: 

• Gloss Lamination – Adds a high-shine, scratch-resistant finish. 
• Matt Lamination – Provides a sophisticated, non-glossy finish. 
• Velvet Lamination – A luxurious, soft-touch option often called “soft-touch lamination.” 
• Anti-Bacterial Gloss – Ideal for Postcards used around food or in hospitality settings. 

Capture Attention with the Perfect Postcard Size 

No matter your design or purpose, choosing the right Postcard size and shape is key to creating an impactful message. From classic A6 Postcards to creative circular shapes, this guide has something for every project. 

If you’re ready to create your perfect Postcards, consider all the options outlined here and start your design process with confidence. Need help? Whether it’s selecting the right paper or getting assistance with creative designs, we’re here to help ensure your Postcards grab attention for all the right reasons.