I have enum:
public enum MyEnum { ValueOne, ValueTwo };

I have entity with column:
@Column(nullable = true, length=255)
@Enumerated(EnumType.STRING) public MyEnum myEnum;

Table in DB have colmun of size 1020 (varchar 1020), but I specified length = 255,
if length = 80, then column varchar 320, if length 40 column 160.
It seems than engine multiples length by 4.
Why is so?