Insider Information

C5 envelopes always seemed a little too roomy for A5 card blanks. Although pairing C5 envelopes with A5 cards has been standard practice for years, we’ve heard increasing requests for a slightly snugger option. That’s why we’re excited to launch our new 152mm × 216mm envelope range—designed specifically to hug your A5 card blank. Customers are raving about how much better they fit compared to a conventional C5 envelope.
Click here to view the range.

C5 Envelopes

Product Filters
Size
Colour
Material Weight
Flap
Filter

Browse our range of C5 envelopes, specifically designed to accommodate A5 card blanks, A5 documents, or an A4 sheet of paper folded in half. The C5 envelope size is 162mm x 229mm (6.4″ x 9″), making C5 one of the largest envelope sizes we offer. 

Whether you’re sending wedding or special occasion invitations, greeting cards, letters or promotional materials, our UK-made C5 envelopes are available in a huge range of colours, finishes and weights – always with sensible pricing. Prices start at just £0.04 each.

We also offer a custom C5 envelope printing service, with high-quality in-house printing, so you can fully personalise your C5 envelopes and make a lasting impression. 

High-Quality C5 Envelopes for Crafting and Card Making

At The Envelope People, we offer an ever-expanding range of C5 envelopes with a huge variety of colours, textures and finishes (including pearlescent and recycled finishes). From Poppy Red and Racing Green to the more subtle tones of Pale Pink, there’s a C5 envelope for every crafting project or special event. 

Ideal for crafters, small businesses and stationery designers looking to add a premium touch to their greeting cards and invitations. 

We also offer high-quality A5 card blanks, craft card, craft paper and cello bags for A5 cards, so The Envelope People is truly a one-stop shop for all your crafting needs. 

Luxury C5 Envelopes for A5 Wedding Invitations

Made from high-quality paper stocks (typically 100gsm–120gsm), our C5 envelopes are perfect for weddings, events and special occasions.  They are an ideal fit for A5 wedding invitations, RSVPs, or Save the Dates. 

Our wide colour range, from bold matte shades to subtle pearlescent finishes, means you can easily match our C5 envelopes to your wedding theme or event branding. Whether you’re an event planner or DIYing your own wedding, be sure to check out our range of wedding envelopes and DIY wedding stationery.  

Competitively Priced C5 Envelopes – Bulk Discounts Available

Our C5 envelopes are ideal for marketing mailers, promotional offers and branded correspondence. Whether you’re looking to purchase a single envelope or a thousand or more, we can supply C5 envelopes in any quantity you require!

Our pricing discount structure is designed to reward customers looking to purchase higher quantities, making our C5 envelopes even more cost-effective for businesses. Plus, we offer a custom printing service, so you can deliver a consistent and professional brand experience from the moment your envelope is received.

C5 Envelopes Frequently Asked Questions

A C5 envelope is 162mm x 229mm (6.4″ x 9″). This size is designed to fit an A5 sheet of paper or an A5 card blank, or an A4 sheet folded in half. C5 envelopes are commonly used for larger greeting cards, wedding invitations and promotional materials. They are smaller than a C4 envelope and bigger than a C6 envelope. Read our ‘Envelope Size Guide’ for a full breakdown of different envelope sizes.

Yes, a C5 envelope is designed to perfectly fit an A5 card blank or A5 piece of paper, with a small amount of space for easy insertion. For a snugger fit for A5 paper or card blanks, check out our range of 152mm × 216mm envelopes.

The correct term for an A5 envelope is a C5 envelope. C5 envelopes are designed to comfortably fit an A5 piece of paper or card blank without folding, or an A4 piece of paper folded once. While the paper is labelled A4, the corresponding envelope is labelled C5 according to ISO 269 standards, which ensures the envelope is slightly larger than the paper so it can be easily inserted.

An A5 envelope (commonly known as a C5 envelope) is 162mm x 229mm or 6.4″ x 9″. This allows an A5 card blank or sheet of paper to fit comfortably inside the envelope.

Yes, we offer a custom C5 envelope printing service for businesses, events and special occasions. Whether you want to add custom graphics, your brand’s logo or each recipient's address, our C5 printed envelopes are the perfect solution.