The theme of the 2026 franking labels is trees. The four labels portray four of the most common trees on Åland.
Scots pine (Pinus sylvestris) is the dominant tree species in Åland. Thriving on almost any type of soil, the straight mast-like trunks can grow up to 30 m tall.
European spruce (Picea abies) makes up about 14% of the forest. It thrives in shady places but is also fragile, its shallow root system making it more vulnerable to windfall and drought.
White birch (Betula pubescens) is one of the most common deciduous trees on Åland. It is recognizable by its white, smooth bark and oval, soft, single-toothed leaves.
Pedunculate oak (Quercus robur) is a hardwood tree that can live up to 1,000 years. On Åland, wild-growing oaks with a girth of over 170 cm are protected. The oak is also an important ecosystem, housing over 900 different species, from insects to lichens.
A series consists of four self-adhesive franking labels of four motifs. The denomination is the same on all four franking labels.
