"Aceste mărimi sunt foarte mari."

Translation: These sizes are very big.

[Gzeebzee]

Mărimi? Measuring size in apples? Supose it makes more sense than us English measuring weight in stones. At least apples are of generally definable size.

[GeoMan2]

You made a wrong connection măr, mere (apple, apples) are not connected with "mărimi" which comes from mare (large, big).