C6 Blank Euro Flap Envelope

Description

Paper Alchemy’s C6 Euro Flap Envelopes measure 114×162mm and are manufactured in Australia from premium paper stock. They are the standard envelope size for A6 invitation cards, RSVP cards, save the dates, and thank-you correspondence — and are available in a range of colours to coordinate across your full stationery suite.

What Is a C6 Envelope? Dimensions & What Fits Inside

The C6 format measures 114×162mm, making it the natural pairing for A6 cards (105×148mm), which fit with comfortable clearance on all sides. It is the most widely used envelope size for wedding RSVP cards, save the date mailers, thank-you card envelopes, and gift voucher packaging. A6 is also the standard size for Australian reply cards — your guests return their completed RSVP in a C6 envelope.

For save the dates and concise single-card invitations, a C6 envelope is the format of choice: compact enough to feel personal, substantial enough to carry a premium-stock card without flex or movement inside the envelope. The 114×162mm dimensions also ensure comfortable handling for guests when opening the envelope.

Why Euro Flap? The Design Choice That Elevates Your Stationery

The Euro Flap — or deep-V flap — features a long, pointed diagonal flap that differs meaningfully from a standard banker or wallet flap. Where a banker flap cuts straight across the envelope at a shallow angle, the Euro Flap extends further down the back of the envelope and tapers to a central point. The sealing edge is longer, the silhouette is more distinctive, and the back of the envelope becomes a design feature in its own right.

For wax seal applications, the Euro Flap is the ideal format: the pointed flap creates a natural centring point for a seal, and the longer sealing surface holds the seal securely. The C6 Euro Flap envelope is the format most commonly associated with wax-sealed wedding correspondence — and for good reason. It photographs beautifully, it opens gracefully, and it signals quality before the recipient has read a single word.

Colour Options for Every Occasion and Suite

Our C6 Euro Flap Envelopes are available in a curated palette spanning classic white, warm ivory, blush, sage, dusty blue, charcoal, and black, allowing you to coordinate your envelope with your invitation stock or choose a contrasting colour for visual interest. Confirm your colour choice at time of ordering — the full palette is displayed in the product images.

For a fully coordinated suite, consider pairing your C6 envelopes with matching envelope liners: available in C6-compatible printed and coloured options, liners transform the inside of the envelope into a considered detail that guests encounter the moment they open it. Envelope printing (guest addresses on the front, monogram or return address on the back flap) is also available — navigate to the Envelope Printing tab for ordering instructions.

RSVP Cards, Save the Dates & More — Use Cases for C6 Envelopes

The C6 envelope is the most versatile format in a wedding stationery suite. Couples use it for: outbound save the dates (mailed to guests 6–8 months before the event), RSVP reply envelopes included inside the main invitation suite (for guests to return their response), thank-you card envelopes sent after the wedding, and gift voucher or favour packaging.

It is also the standard envelope for standalone correspondence — handwritten notes, enclosure cards, and personal letters — making it a format that extends well beyond the wedding itself. Many couples who invest in a custom wax seal stamp continue using their C6 envelopes for personal correspondence for years after the event.

Pairing Guide: Liners, Wax Seals & Australia Post Postage Tips

A custom wax seal stamp pressed onto the back flap of a C6 euro flap envelope is one of the most iconic finishing details in luxury wedding stationery. Pair your seal with sealing wax beads from PA’s range — 3–4 beads per 25mm seal — and allow a generous set time before stacking sealed envelopes. For batch preparation, use the wax seal sticker method: pour and stamp onto a silicone mat, allow to cool, then apply adhesive-backed seals to each envelope with precision and no open-flame pressure during the final send.

Australia Post guide: a C6 envelope (114×162mm) falls within the standard letter category (up to 130×240mm and 20g). A single A6 invitation card on standard stock typically weighs 5–15g, comfortably within standard postage rates. When adding a wax seal (approximately 5–8g) and an envelope liner, weigh a fully dressed sample before purchasing your postage allocation. Hand-cancelling at your local post office is recommended for wax-sealed envelopes to protect the seal in transit.

C6 vs B6 Envelopes — Understanding the Difference

If you have been searching for B6 envelopes and arrived on this page, this note is for you. A B6 envelope measures 125×176mm — slightly larger than a C6 (114×162mm) and used for slightly larger cards or slightly more generous clearance around an A6 card. Both are common in Australian stationery, and the size difference is small enough that they are often used interchangeably in search contexts. Paper Alchemy’s euro flap range is the C6 format; if you specifically need a B6 euro flap envelope, please contact our team to discuss options.

As a practical guide: if your invitation or RSVP card is exactly A6 (105×148mm), the C6 envelope is the correct fit with standard clearance. If your card is slightly larger than A6 — for instance, a die-cut or trimmed card that measures closer to 115×165mm — the B6 envelope may offer a better fit. Our team can advise based on your specific card dimensions.

Are Paper Alchemy C6 envelopes manufactured in Australia?

Yes. Paper Alchemy’s C6 Euro Flap Envelopes are manufactured in Australia from carefully selected premium paper stocks, with a 120gsm weight that is noticeably heavier than standard envelopes. This weight contributes to the premium feel of the finished invitation and ensures the envelope holds its shape during handling, addressing, and transit. Locally manufactured envelopes allow for quality control and paper selection that imported alternatives cannot match — and they are produced without the extended lead times that international supply chains can introduce.

Will a wax seal survive in Australia Post?

Flexible sealing wax — such as Paper Alchemy’s sealing wax beads — is formulated to be more mail-safe than traditional brittle sealing wax. It has enough flex to withstand standard postal handling without shattering. That said, wax seals remain fragile relative to paper elements, and we recommend two precautions: first, hand-cancel your envelopes at the post office counter rather than allowing them to pass through automated sorting machinery; second, consider enclosing the sealed envelope in a plain outer envelope for additional protection. These steps significantly reduce the risk of seal damage in transit.

What envelope sizes does Paper Alchemy stock?

Paper Alchemy stocks euro flap envelopes in C6 (114×162mm, for A6 stationery), C5 (162×229mm, for A5 stationery), and DL (110×220mm, for folded correspondence). All are available in the same premium 120gsm Australian-manufactured stock and euro flap format. Browse our full envelope range to compare sizes, or contact our Sydney studio to discuss which format best suits your invitation suite dimensions.