Red blood cells are entirely different in size. Look up MCV and MCVC on a CBC.
More panic in terms of your question.
MCHC. Fixing your typo.
A high RDW is what you see when rbcs are significantly different in size.
MCV can be normal if you have a nicely divided population because it is an average.
Mean corpuscular volume.
You are welcome. Signed, hematologist.