Factual error: Me 262's were armed with 30 mm cannon in the nose, a round penetrating a canopy would leave a hole much larger than was depicted, and being high-explosive, once it detonated inside the cockpit, the pilot was toast. One of the red tails had a number of holes in his canopy.
Suggested correction: Reports suggest twenty mm cannon fire through the canopy will not inherently detonate and can pierce through. The 30 mm of the particular enemy craft however may be unique enough to differ, but is ambiguous then for now until someone finds new data. As for size, keep in mind the nature of how penetration does not look right and I believe care to not exaggerate the size not be taken. Personally am not aware of comparison enough to inform on true size.
