I was assuming the 2 meter length was the depth in this case since only the 333 meter part was. The blade's edge thickness is what's used as the other dimension
The area of destruction should look like this (not for complete scale)
Though looking back OP did mention that 2cm was width (which can mistakenly refer to depth sometimes or being as broad as length but I digress) so maybe it's better to just ask for the feat in question
Can you please provide the feat this is referring to?