They tend to provide a lasting memory of a personal holiday – depicting landscapes, stunning views and sandy beaches.
And along with the creations of flowers and shots of the seaside, this year's Pakefield Postcard Auction is sure to capture the imagination of potential bidders.
About 80 postcards have been designed, not only by professional artists, but also by school children and even some celebrities.
The idea of the auction is for people to bid for the postcards – with the identity of the person who designed them kept as a secret until they are sold.
It is the third year that the event has been hosted by the Ferini Art Gallery in Pakefield – with this year's funds going to support the Seagull Theatre.
In 2014, just over £1,000 was raised for Each Anglia's Children's Hospices (EACH), before £2,500 was presented to the Lord Kitchener's Memorial Centre a year later.
Michaela Hobbs, gallery manager, said: 'We will be raising money by selling postcard-sized original art by professional and amateur artists alike.
'They have created small but carefully executed pieces of art in all mediums, textile, plaster and paint, mosaic, pencil, pen and ink, watercolour and Bristol Blue glass.
'We like to keep the identity of the person who painted the postcards hidden until they are sold and the artist is revealed on the back of the postcards. These are original pieces of art – they are just very small.'
Warwick Davis, best known for his roles in the Star Wars and Harry Potter films, has produced a postcard alongside his daughter Annabelle.
Paralympian Jessica-Jane Applegate has also created a postcard.
The exhibition, which started on July 15 and runs through until August 14 – allows members of the public to view all of the postcards and make a pre-bid on their favourite ones at the gallery on All Saints Road.
The live auction takes place on Wednesday, August 17 at Pakefield Community Church Hall from 6pm until 10pm.
Tickets, which cost £5, are available from the gallery.
The postcards will be also available to view online at www.pakefieldpostcardauction.co.uk and on Facebook by searching Pakefield Postcard Auction 2016.
The gallery is open from 11am and 4pm on Fridays, Saturdays and Sundays.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here