Start with whose card this actually is
A newborn twin card is written to the parents. The babies cannot read it, will not remember the week it arrived, and are not, yet, an audience. It is worth watching what that does to the writing. A card to the parents can say honest things about the last month of the pregnancy, the hospital bag that got packed twice, the scan where a second heartbeat turned a plan into a different plan. A card written as if the babies were reading it over your shoulder can only coo.
Later, the card changes owners. Parents of twins keep these cards, and plenty keep them separately, a box or a folder per child, which is Saffron's system and the reason a shared card can end up homeless. So write the newborn card to the parents, but write it knowing it will be filed twice, once in each child's box, or photographed for one box and kept in the other, or argued about in eighteen years by two adults who both claim it. Lines addressed to the parents survive that filing. Lines that name each baby, somewhere in the card, survive it better.
That gives you the shape. One greeting to the parents. Something specific to them, not to twin parenthood in general. Then each baby named and given a line, or at least a clause, of her or his own. Then a close that offers something real, a meal, a school run for an older child, a Tuesday afternoon of holding whichever baby is awake so a parent can sleep. Two babies do not need twice the sentiment. They need to not be written as one baby with a spare.
One card or two, and the keepsake box test
For a birth, one card is right, and two cards can look like a clerical error. The parents have had one delivery, however long it took, they are in one hospital room or one house, and they will open the post in one exhausted pile on the kitchen table. Send one card to the household. Make it a good one, with room inside, because a twin card has more writing to do than a standard new baby card and the small folded ones run out of space by the second name.
The exception is closeness. If you are a grandparent, a godparent, or the kind of aunt who will be in these children's lives weekly, two small cards, one per baby, each with a different line inside, is a deliberate and lovely thing to do at a birth. It says you have already started treating them as two people, which is the compliment twin parents hear least often in the first month. Do not do it as a reflex for twins you will meet twice a year. The parents can tell the difference between a gesture and a doubling.
After the birth, the rule flips by degrees. A shared birthday card for toddler twins is normal and nobody minds. By school age, send separate cards if you are sending cards at all. Twin parents say this plainly in every forum where the subject comes up: each child has her own box of kept cards, her own friends, eventually her own party, and a card addressed to both of them belongs fully to neither. The keepsake box test settles most versions of this question. Ask which box the card goes in. If the honest answer is neither, split it.
Money follows the same logic. Cash or a voucher for the family, in one card, is fine at a birth. Later, if you put money in a birthday card for twins, put the same amount in two envelopes with a name on each. Equal is the point, and visible. Twins keep score on this long before adults think they can.
Name each baby, and get the order right without making it a system
Copy the names from the birth announcement, a message from a parent, or the card the hospital photo came with. Not from a cousin's social post, not from memory, and not from how the names sounded on a phone call in a noisy ward. Twin names are often a pair in the parents' minds, similar in length, sometimes starting with the same letter, and that makes them unusually easy to swap or misspell in a card that then gets kept for decades. Check the spelling letter by letter. It takes twenty seconds. Saffron's younger daughter, younger by those eleven minutes, has a name people add a letter to, and at least four cards in her box have the extra letter in them permanently.
Then the order. The announcement order is the safest default, because it is usually birth order and it is the order the parents themselves are using this week. Use it in the greeting and the first mention. After that, stop being consistent. If every paragraph, list and sign off in the card puts the same baby first, you have built a small hierarchy out of habit, and twin parents notice it even when they cannot say why the card feels slightly off. Swap the order in the second half of the card. Let the second named baby get the first joke, the first blessing, the first line of her own.
What not to do is merge them. Not into a nickname for the pair, not into a plural pronoun for the whole card, and not into the phrase the twins, used as if it were a name. Once or twice as shorthand is ordinary English. As the card's main way of referring to two named people, it tells the parents you have not yet bothered to learn which is which. They know it is hard at this stage. Everyone mixes the babies up in person, and nobody minds that. A card is written slowly, with the names available to check, so it is held to a higher standard than a doorstep conversation.
If you genuinely do not know the names yet, because the card is going to a colleague whose twins arrived early and the news came third hand, write to the parents and say so plainly. A warm card that congratulates them and asks what they called the babies beats a card that guesses, and it beats waiting three weeks in silence until the names reach you.
The build: one shared opening, two separate middles, one honest close
Most twin cards fail in the middle. The opening congratulates the parents, the close wishes everyone well, and between them sits a paragraph about twins in general that could be pasted into any card for any family. Build the middle as two short, separate pieces, one per baby, and let each one carry a different kind of detail. One can be about the name and where it came from. The other can be about timing, weight, the photograph you were sent, or which grandparent she apparently resembles. Different kinds of detail matter more than equal length. Two lines of identical shape, one per baby, read like a form that has been filled in twice.
Congratulations, all four of you. Saffron, you look in that photograph like a woman who has been awake since March, which is roughly true, and the babies look entirely unimpressed by the fuss, which I hope continues.
Welcome to the first named girl, whose name we have been practising saying out loud since the scan. You arrived first and have apparently been in charge ever since.
And welcome to her sister, eleven minutes behind and already the one everybody describes as the calm one. May you keep proving that description wrong at useful moments.
I am on meal duty whenever you want it. I will bring food that freezes, eat none of it, hold whichever baby is awake, and leave before I am a third job.
Read that shape, not those words. The shared opening is about the parents and this family, the two middles could not be swapped without somebody noticing, and the close offers a named, limited, believable thing. A good twin card is usually shorter than people fear. What it cannot be is symmetrical. Real twins are not symmetrical, and a card that pretends they are, two matching lines, two matching wishes, sounds written by someone who has only met the idea of them.
For a baby shower card, before the birth, adjust two things. You may not have names, or the names may be secret, so the separate middles become one line about each expected baby only if the parents talk about them that way themselves. And keep jokes about sleep, chaos and workload lighter than you would after the birth. Beforehand they are predictions about strangers. After the babies are home, the same jokes are reports, and reports are funnier.
When the babies come home on different days
This is the twin card people most often delay, and delay is the one real mistake available. Twins are born early more often than single babies, staggered homecomings are common, and a family can easily spend weeks with one cot filled at home and one incubator visited twice a day. If you wait until both babies are home to write, your card arrives after the hardest stretch, congratulating them on a finished story they are still in the middle of.
Write now, and write to the whole situation in plain language. Congratulate them on both babies by name. Say, if the family has shared it, that you know the shape of their week at the moment, one baby at home and one being visited on a ward. Do not add a forecast. No likely homecoming dates, no reassurance you are not qualified to give, no comparison of the two babies' progress. Parents in this position get a great deal of amateur medical commentary. A card should contain none of it.
Congratulations on both of your daughters, named here in full. I was so glad to hear they are here. I know your days are currently split between the house and the neonatal ward, which sounds like a hard way to start any family. I am thinking of all four of you. There is a casserole in the porch box from Thursday, with the date written on the lid, and it asks nothing of you at all.
Then expect to write again. A short second card when the second twin comes home is not duplication, it is the card that marks the day the family is finally in one place, and parents remember who noticed it. Keep it brief. This is also the one situation where two cards, arriving weeks apart, each end up kept, often one in each box, which solves Saffron's filing problem by accident.
One boundary worth stating carefully. If a twin has died, do not use any version of the thought that the parents still have one baby, or are lucky in that way. Neonatal bereavement charities that work with twin parents are blunt about how much that sentence hurts, and they advise the opposite: name both babies if the parents have shared both names, congratulate and grieve in the same card only as far as the parents themselves have done so publicly, and follow their lead on whether the surviving baby is called a twin. When you do not know their lead, a short card that names the baby who died and does not try to balance the loss with the surviving baby is the safer, kinder shape.
Group cards, gift tags, and the envelope
A group card for twins has one job the sender usually forgets, which is leaving enough physical room. Twenty colleagues signing the inside of a small card will use the space the message needed, and the result is a card full of signatures and no actual words for either baby. Pick a large card or a board style card, write the main message first, in the middle, with both names in it, and let signatures collect around it. If you are organising it, write that message before you pass the card round. Organisers who pass a blank card round first get it back full, and then have to squeeze the point of the thing into a margin.
Inside a group card, one signer naming a baby is worth five signers writing a general line about twins. If you know anything specific, a name, the fact that the parents met at work, that these are the first grandchildren on one side, use the line for that and sign your name to it. If you know nothing specific, a clean signature is more honest than a borrowed sentiment with your name under it.
The gift tag is not the card. Tags get separated from gifts in the unwrapping, photographed badly, and thrown away with the paper, so a tag should carry names and a from line, and nothing you would mind losing. Two gifts need two tags, one per baby, even if the gifts are identical, especially if the gifts are identical. One shared gift, a play mat, a double pram accessory, a meal subscription, needs one tag addressed to the parents. Match the tag count to the gift count, not to the baby count, and put the real writing in the card where it will be kept.
On the envelope, write the parents' names, or the family name if you know it is used. Not the babies' names alone, and never a joint label for the pair. The post is opened by adults who have not slept. Address it to the adults.
Lines that land badly with twin parents, however warmly they are meant
Most of the standard twin lines are built on doubling, and doubling is exactly what the parents are trying to get a day's distance from. Double trouble is the worst offender, not because it is cruel but because it is the fifth time they have read it that week, twice of them in cards from people they love. The same goes for any line whose entire content is that there are two of everything, two sets of nappies, two lots of crying, twice the work. It is arithmetic, not a message, and the parents can do arithmetic.
Comparisons start early and a card should not start them earlier. Lines that assign the babies roles, the quiet one and the loud one, the good one and the mischievous one, the pretty one and the clever one, are jokes at eleven minutes old that can still be quoted at eleven years old. I used one in the model card above, the calm one, and then had the line itself hope she proves it wrong. If you use a role joke at all, undercut it in the same breath, or leave it out. Safer still is a detail that belongs to one baby by circumstance, birth order, a name's origin, a photograph, because circumstance does not harden into a personality.
Questions do not belong in a card either. Which one is your favourite, were they natural, do twins run in the family, are they identical when the babies are a boy and a girl. A card is read in private and cannot be answered, so a question in it just sits there. Turn anything you are curious about into a statement about the babies in front of you, or save it for a conversation the parents can steer.
And keep advice out entirely. Twin parents receive feeding, sleeping and scheduling advice from professionals, relatives and strangers in supermarket queues, in quantities no single baby attracts. A card that contains one useful offer and no advice at all will be remembered with a gratitude out of all proportion to its length.
Turn it into a group card
Twins are the strongest case for a group card in the whole new baby cluster, because the alternative is arithmetic of a different kind. A workplace, a friendship group or a whole street sending thirty individual cards means thirty envelopes opened by two people who are feeding babies in shifts, and a pile of cards that mostly say the same thing. One shared card, organised early, with a real message written first and both babies named in it, lands harder and costs the parents nothing to deal with. The card written for the drafted twin bank's readers and the card in this pillar obey the same rule, by the way. One message, two names, no doubling jokes.
A congratulations ecard with room for many signers solves the space problem described above, and a group ecard with multiple signers lets relatives in other time zones add a line before the card is sent, which matters when half the family heard the news by phone at 3 a.m. their time. You can create a card online in a few minutes, write the central message yourself, and invite the rest to sign around it.
If the group card is a second attempt because the babies arrived before the baby shower card was ever sent, the wording in what to write in a baby shower thank you card covers the parents' side of that exchange, and the register in what to write in a Mother's Day card is a useful model for the first card those parents get the following spring, when the twins are no longer news and the card has to be about the mother instead.
Saffron's drawer card is still in Faversham, unless the takeaway menus have finally absorbed it. Her daughters are two now. At their birthday in April I sent two cards, posted in one envelope to save her the sorting, each with the other sister mentioned once, by name, in the second paragraph, and neither of them first both times. She rang me to say they had gone straight into the boxes. Then she told me one of the girls had spent the morning trying to wear a single red welly on her hand, and that the other welly has been missing since some time in August, and nobody in that house expects to see it again.