Following the rather half-hearted declaration of hostilities against Germany, it was decided that the Hakaristi should be replaced, given its obvious similarity to the German swastika. Accordingly, Finland adopted a roundel in white, blue and white, which remains in use to the present day.
These decals are scaled to represent 30", 36" and 48" roundels in 1/300 scale. (They're also ideal for large aircraft in 1/600; equivalent to 60", 72" and 96" diameter.) The actual diameters are 2.5mm, 3mm and 4mm.