Have you seen all the Finnish Moomin stamps ever released? Check this history of the Moomin stamps, here they are all presented with the First Day Covers!
31.1.2014: Tove Jansson 100 years / Tove Jansson 100 vuotta
(2 x 1st class stamps)
6.5.2013: Moomin favorites / Muumisuosikit
(a booklet of 6 1st class stamps)
6.5.2011: The Book about Moomin, Mymble and Little My / Kuinkas sitten kävikään?
(a booklet of 6 2nd class stamps)
6.5.2009: Moomin cartoons / Muumit sarjakuvissa
(a booklet of 6 1st class stamps)
9.5.2007: Summer in Moominvalley / Muumilaakson kesä
(a booklet of 6 1st class stamps)
9.8.2004: Moomins / Muumit
(1st class stamp printed on a special paper)
7.5.2003: Moominland Midwinter / Muumit ja taikatalvi
(a booklet of 6 1st class stamps)
15.3.2000: Moomins / Muumeja
(a booklet of 4 1st class stamps)
15.1.1998: Moomins / Muumeja
(a booklet of 4 1st class stamps)
27.1.1994: Friendship – Moomins / Ystävyydellä – Muumeja
(a booklet of 8 1st class stamps, 2 different designs)
9.10.1992: Moomins – Nordia 1993 stamp exhibition / Muumit – Nordia 1993 postimerkkinäyttely
(a booklet of 4 stamps á 2,10 mk)
Stay tuned, more Moomin stamps released soon!
Pictures from here.