Brief Answer:
it indicates RBCs size

Detailed Answer:
Dear Sir, I have gone through your question and I understand your concerns.

Mean corpuscular volume (MCV) is the average volume of red cells in a specimen. MCV is elevated or decreased in accordance with average red cell size; ie, low MCV indicates microcytic (small average RBC size), normal MCV indicates normocytic (normal average RBC size), and high MCV indicates macrocytic (large average RBC size).

The normal value for MCV is 80-96 fL/red cell in adults.

The common causes of macrocytic anemia (increased MCV) include Folate deficiency anemia, Vitamin B12 deficiency anemia, Liver disease, Hemolytic anemias, Hypothyroidism, Excessive alcohol intake and Aplastic anemia.

Heavy alcohol intake over a long period of time is toxic to the bone marrow where the red blood cells are made. This makes the RBCs produced larger than normal and increases the MCV level.

Usually stopping the alcohol intake will allow the bone marrow to recover and the MCV level returns to normal over a period of two to three months.

I hope I answered your question.
Feel free to ask further.
Regards

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Brief Answer:
Recovery after two months

Detailed Answer:
Dear sir, the bone marrow susceptibility to being affected by alcohol is different from one individual to another but on average 2 standard drinks per day or 12-14 standard drinks per week is considered to be overdrinking and can cause various damages to your body organs .
the recovery is expected to be full after 2 months from stopping the alcohol intake but after one month you should expect some improvement as well. I hope you find this helpful

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