Picking out save-the-dates is often one of the first steps of wedding planning. After the date is set or the venue is reserved, it’s time to let friends and family know. Save-the-date postcards are a popular (and often more cost-effective) way to do just that. Not only do they cost less, but postcards also require less postage than a regular letter. They’re also a bit more sustainable (less paper means less waste) and are ready-made to be put in a place of honor on the fridge. And while the formal wedding invitation needs to include more information, the relevant details for a save-the-date can fit easily onto a postcard. Typically, there is also room to jot down a little note or sign it to add even more personalization.

Check out these 21 save-the-date inspirations from The Knot that are sure to get your creativity flowing!