One image shows a beaming Estelle, who will turn three in Februrary, with a bow in her blonde hair, sporting a light blue dress and clutching a bunch of royal blue flowers. Another depitcts the youngster relaxing on a sofa with Victoria, 37, and Daniel, 41.
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As well as the photos of the crown princely family, three more formal portraits of the Swedish King and his wife were also released.
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King Carl XVI Gustaf and Queen Silvia, who have been married for 38 years, posed both together and individually for the postcards with Germany-born Silvia wearing an elegant pale pink silk dress.
In the photos the 70-year-old consort is adorned with large pink-hued jewels, a dazzling diamond tiara, a light blue sash and a portrait of her husband.
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The album images were shared on the royal family's Facebook page, where they garnered over 14,000 likes and scores of comments from fans.
The new postcards of the Swedish royals are available to buy at the Royal Palace of Stockholm.