C5 Envelope Size Guide


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Everything You Need to Know About C5 Envelopes - Whether you're sending important documents, elegant wedding invitations or handmade greeting cards, C5 envelopes are one of the most versatile envelope sizes available.

Measuring 162 × 229mm, C5 envelopes are designed to fit Half A4 (148 × 210mm) inserts perfectly, making them ideal for professional correspondence, certificates and premium stationery.

What Are C5 Envelopes Used For?

What Are C5 Envelopes Used For?

C5 envelopes are incredibly versatile and are commonly used for: Wedding Invitations Perfect for invitation suites containing invitations, RSVP cards, information cards and other inserts without excessive folding. Certificates An...
What Fits Inside a C5 Envelope?

What Fits Inside a C5 Envelope?

A C5 envelope is specifically designed to fit: Half A4 Sheets (148 × 210mm) Large greeting cards Wedding invitation suites Certificates Brochures Important documents Craft projects Using the correct envelope...
C5 Envelope Dimensions

C5 Envelope Dimensions

C5 envelopes measure 162 × 229mm, providing a generous size for larger documents and cards while remaining practical for everyday mailing. Their popular format makes them a favourite for businesses,...

Frequently asked questions

What fits inside a C5 envelope?

A C5 envelope measures 162 × 229mm and comfortably fits Half A4 (148 × 210mm) paper, larger greeting cards, invitations, certificates and brochures.
Can I put an A4 sheet into a C5 envelope?

Yes. An A4 sheet folded once in half creates a Half A4 (148 × 210mm) sheet, which fits perfectly inside a C5 envelope.
What are C5 envelopes used for?

C5 envelopes are commonly used for:

  • Wedding invitations
  • Certificates
  • Business documents
  • Brochures
  • Greeting cards
  • Creative stationery
Are C5 envelopes suitable for wedding invitations?

Yes. C5 envelopes are ideal for larger invitation suites containing multiple inserts, RSVP cards, maps and information sheets while keeping everything together neatly.
Are C5 envelopes suitable for business use?

Absolutely. C5 envelopes are widely used by businesses for contracts, reports, invoices, brochures and important correspondence because they allow documents to be mailed with minimal folding.