What size cardstock should you use for wedding invitations?

The size of your invitation cardstock affects the layout, the envelope and the postage cost. A6 is the most popular choice for a single card. It is compact, fits neatly in an A6 envelope, and works well for a short invitation with a date, time and venue. A5 is larger and gives you more space for wording, a map or a photo. You can use A5 as a flat card or fold it to make a four-page A5 booklet that fits an A5 envelope. Another option is a square card, around 140 by 140mm, which looks modern but may need extra postage because it is not a standard rectangular shape. If you are adding inserts, make sure they are slightly smaller than the main card so they sit neatly inside. For example, an A6 main card can take an A7 insert, which is 74 by 105mm. Always check the envelope size before you finalise the cardstock. A card that is too thick or too large for the envelope can cause damage in the post. Your stationer can help you choose a size that balances design, cost and practicality. Remember that the size also affects how the invitation feels when guests open it.