The Type C1 variant of the Type C roundel was predominantly used on the fuselage sides of mid-late war aircraft. It was similar to the Type C, but had a thin outer ring in yellow.
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 sizes are 2.5mm, 3mm and 4mm.