erected penis length : 13.2 cmis it normal ?
Average penis length and girth?
Average penis sizes are one of those things that you'd think would be well known, but guys lie so much that a lot of the figures floating around are just not reliable. There is a summary of erect penis lengths by nation at http://www.everyoneweb.com/worldpenissize/ (click on the "Penis length average chart" link), though I wouldn't place much credence in the data that is self-reported.
However there is no doubt that you are in the normal range.
Girth is even less well known than length - there is very little reliable data.