If my dick is 4 1/2 is it average sized?

Here are some... Penile size is defined with the measurements of its length and girth at flaccid and erect state. To reveal these, use "human penis size" as key words to look up the articles in Wikipedia; thereby you gain your needed info. So, what does "4.5" denote, in cm or inch, at erect or flaccid? Best wishes...