German Balkankreuz in the early war style. This design is useful for the fuselage and lower wings of most German aircraft through to 1943, when the later, more simplified, styles began to supercede it. Most aircraft had a similar style on the upper wings, but with the white rather thinner, to make it less conspicuous. Sheet 300-GE-2 is ideal for this, or use this sheet anyway if you want a more prominent looking marking.
These decals are scaled to represent 30", 36" and 48" sizes in 1/300 scale. The actual sizes are 2.5mm, 3mm and 4mm. While they're intended for 1/300 aircraft, they will of course come in handy for vehicle markings in larger scales as well.
These designs are of course supplied on the same paper as all of the others (actually a very pale blue) I've just given them a coloured background so that the white is more readily visible.