title: What is the size of the enum PostgreSQL type?
body: <p>I would like to know what is the size of an enum variable of PostgreSQL. For instance, if I create an enumeration type A with 100 different items, what would be the size in bytes of  it? In addition, when I create a table that contains an attribute of type A, what is the size of this attribute?</p>
  
  <p>I checked the PostgreSQL documentation, but I didn't understand the last part that talk about the enum type sizes.</p>