I made a "research" based on my own close penis encounters that I have had with hundreds of guys during the past fifteen-sixteen years. I have always written down the age, race and penissize of my sex-partners.
I can say, that I found that Danish average penissize is 16 cm, or about 6,3 inches....I don´t consider that small
In comparison, asian average penissize is 13,7 cm, or about 5½ inches....
The sample was 126 asian guys and 283 Danish guys.
For Swedes the average was even higher: 16,9 cm or 6,7 inches, BUT the sample of Swedish guys was only 9 different guys, so you can´t take that result TO serious, even that it gives some Idea: that Swedes are certainly not small!
Other penissizes by race, calculated after my close encounters with guys of those races:
Black men: 17,2 cm. or 6,8 inches....the sample was 33 black men.
Arab men: 14,1 cm. or 5,6 inches....the sample was 22 arab men.
Latin men: 15,5 cm. or 6,1 inches...the sample was 23 latin men.
Of course I know that my personal encounters don´t represent all guys of the different races. BUT I believe that they give som Idea of those races penissizes....especially what concerns asian and scandinavian penissizes, because the samples for those men were quite big (more than 100 men)....
P.S: how did I measure: with some of the guys, but only few of them, I actually DID measure them with a ruler. But with most of them I just calculated their size by using my fingers or hands, or sometimes my own penis, to compare with. I know the lenght of my hands, fingers and penis, so it´s not that difficult to calculate a guys almost precise penislenght by putting my hand or my fingers on the top of his penis (which I do with discretion, because I don´t always want the guy to notice that I am actually measuring him LOL).
Of course my stats are not scientific, but I still find them pretty close to reality. Especially because I have had hundres of guys, the sample of men is quite significant and I believe that my stats give at least a quite fair Idea of what is the average penissize for men from different races