How to Mail Your Wedding Invitations: Everything You Need to Know

"Your invitations have been crafted with extraordinary care. How they are sent deserves the same attention."

You have spent months designing the perfect invitation suite. The paper is beautiful, the printing is exquisite, and the envelopes have been addressed with care. And then comes the moment that many couples give surprisingly little thought to: actually getting them in the post.

Mailing luxury wedding invitations is not quite the same as dropping a birthday card into a postbox. There are a few important things to consider, from weighing and stamping correctly to protecting wax seals and delicate finishes from the rigours of the postal system. Getting this stage right means your invitations arrive looking exactly as they left, which is the whole point.

This guide covers everything you need to know, whether you are posting within the UK, within the USA, or sending internationally to guests across both.

A brief note on timing: If you are wondering when to send your invitations, we have covered that in detail in our guide to save the dates and invitation timelines. As a general rule, wedding invitations should go out eight to ten weeks before the wedding, or three to four months in advance for destination weddings. The rest of this post focuses on the how rather than the when.

Weigh Your Invitations Before You Stamp

This is the step that is most commonly skipped, and the one that causes the most problems. A luxury invitation suite with multiple inserts, a thick envelope, and a wax seal can weigh considerably more than a standard letter. Applying the wrong postage means your invitations may be returned, delayed, or delivered with a 'postage due notice', which is not the first impression you want to make to your guests.

Before you buy a single stamp, take a fully assembled invitation, sealed and ready to post, to your local post office and have it weighed. This gives you the exact postage required and removes any guesswork. If your suite varies in weight, for example if some envelopes contain additional inserts for certain guests, weigh each variation separately.

Mailing Invitations in the UK

In the UK, wedding invitations are posted through Royal Mail. Most luxury suites will fall into the large letter category rather than standard letter, due to their weight and dimensions, which means the postage cost will be slightly higher than a regular stamp. Always check the current Royal Mail size and weight guidelines before purchasing stamps, as rates change periodically.

For a beautifully crafted suite, we would always recommend choosing stamps that feel considered rather than purely functional. Royal Mail offers a range of special issue stamps throughout the year, and vintage stamps sourced from a reputable dealer can add a genuinely lovely finishing touch to a hand-addressed envelope.

Here are the current Royal Mail stamp prices as of April 2026, correct at the time of writing:

• First Class Standard Letter (up to 100g): £1.80

• First Class Large Letter (up to 100g): £3.30

• Second Class Large Letter (up to 100g): £1.55

• Most luxury invitation suites will fall into the Large Letter category

• First Class delivery is typically one to two working days within the UK

• Wax seals can catch on automated sorting machinery, making hand cancelling at the counter essential for luxury suites

• Always request proof of postage when handing over at the counter

Mailing Invitations in the USA

In the USA, wedding invitations are sent through USPS. As with Royal Mail, the size and weight of a luxury suite will typically push it beyond standard letter rates, which carries a higher postage cost. It is essential to have your invitations weighed at a USPS counter before purchasing stamps to ensure the correct postage is applied.

One thing worth knowing specifically for the USA is that square envelopes, which are a popular choice for wedding stationery, carry an additional non-machinable surcharge with USPS as they cannot be processed by standard sorting machines. If you are using square envelopes, factor this into your postage calculations from the beginning.

Here are the current USPS stamp prices as of 2026, correct at the time of writing:

• First Class Letter (up to 1 ounce): $0.78

• First Class Letter (up to 2 ounces): $1.07

• Additional ounce: $0.29 per ounce

• Non-machinable surcharge for square envelopes: $0.49 per envelope, on top of the base rate. As a practical example, a 2oz square envelope would cost $1.07 plus $0.49, totalling $1.56

• Most luxury invitation suites will weigh at least 2 ounces, so always weigh a fully assembled envelope before purchasing stamps

• Forever stamps are always valid for first class postage regardless of future rate changes, making them a wise choice to stock up on

• Vintage and commemorative stamps are available through USPS and authorised dealers and make a beautiful addition to a luxury suite

• Always request a certificate of mailing at the counter for your records

Please note that postage rates change regularly in both the UK and the USA. Always verify the current rates with Royal Mail or USPS directly before purchasing stamps, as the figures above were correct at the time of writing (April 2026) but may have since been updated.

Hand Cancelling: Why It Matters

This is one of the most important things you can do to protect your invitations in the post, and one of the least well known outside of the stationery world.

When you drop a letter into a postbox, it passes through automated sorting machinery that stamps, scans, and processes envelopes at speed. For a standard piece of post this is perfectly fine. For a luxury wedding invitation with a wax seal, embossed details, or a delicate lining, it can cause real damage. Crushed wax seals, bent corners, and torn linings are all common results of machine processing. In most cases, wedding invitation envelopes sealed with a wax seal are not suitable to go through the sorting machinery and therefore will be required to be hand cancelled.

Hand cancelling means taking your invitations directly to a post office counter and asking the member of staff to cancel the stamps by hand rather than sending them through the machine. This routes your invitations through manual processing, which is considerably gentler and far less likely to cause damage.

It takes a little more time and requires a trip to the post office counter rather than a postbox, but for a suite you have invested in, it is absolutely worth it. In the UK, simply ask at the Royal Mail counter for your mail to be hand cancelled. In the USA, ask your USPS counter staff to hand cancel where you'll be asked to pay the non-machinable surcharge of $0.49 per envelope, so when adding the total cost of postage, ensure to add this on top of the base rate.

Protecting Your Suite Before You Mail

Beyond hand cancelling, there are a few additional steps worth taking to ensure your invitations arrive in perfect condition.

If your suite includes hand-addressed calligraphy envelope and a wax seal on the outer envelope, it is worth considering the traditional approach of using both an inner and an outer envelope. This is a long-standing convention in formal wedding stationery known as 'The Double-Envelope Method'. The plain outer envelope carries the address in a simple printed font, taking whatever wear comes from the postal journey, while the inner envelope bears the wax seal and the beautiful calligraphy addressing, so the suite arrives pristine and protected inside. It is a beautiful tradition that serves a genuinely practical purpose, and one worth discussing with your stationer if you are particularly concerned about protecting a delicate seal.

If you are using a single envelope with addressing on the outside, hand cancelling remains your most effective protection for wax seals. You can also write "Fragile" or "Do Not Bend" on the back of each envelope before handing them over at the counter, which flags them for careful handling throughout the process.

1. For suites with vellum wraps, ribbon, or belly bands, make sure everything is secured neatly before sealing. Loose elements can shift during transit and arrive looking untidy.

2. Avoid posting in extreme weather conditions where possible. Heat can soften wax seals and cause them to stick to other surfaces inside the envelope.

3. Always keep a small number of spare invitations back until you are confident all have been received. If one goes astray, you want to be able to resend without delay.

4. Request proof of postage at the counter when you hand them over. It costs nothing and gives you peace of mind that they have been formally accepted into the postal system.

A Note on International Postage: If you have guests in both the UK and the USA, or further afield, international postage requires a little extra planning. Allow additional time for international delivery, particularly for guests in more remote areas, and check the current international rates with Royal Mail or USPS before posting. For destination wedding guests who may be travelling from overseas, sending their invitations a little earlier than your domestic ones is always a considerate touch.

Final thoughts

Mailing your wedding invitations is the last stage of a process that has involved a great deal of care and intention. It deserves the same thoughtfulness as everything that came before it. Taking the time to weigh correctly, choose beautiful stamps, hand cancel at the counter, and protect your suite in transit means your guests receive something that looks and feels exactly as it was meant to. That moment when the envelope lands on their doormat is the first chapter of your wedding story. Make sure it arrives beautifully.

Let us handle it for you! As part of our stationery service, we offer full mailing support for both UK, US and international postage. We weigh every invitation individually, apply the correct postage, and send your suite using beautiful vintage stamps that complement the aesthetic of your stationery rather than undermining it. For couples who want every detail considered right to the very last moment, this service ensures your invitations leave our studio as beautifully as they arrived.

Let's Create Something Beautiful

From designing your suite to getting it safely into the hands of your guests, we are here to help at every stage. Enquire to find out more about our full stationery and mailing service.

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