i wonder how you qualify the sizes into XS, S, M, L, XL and XXL. how about this scale:

XS below 4in (micro)
S below 5in (little dick)
M between 5-6in (average joe / official average sizes)
L bigger than 6in (biggie)
XL bigger than 7 (large cock)
XXL bigger than 8in (horse cock)

how about this length scale, which size are you and add a pic of your fully erected measured penis if you like. remember to always measure on top from the base to the tip of the glans and bone pressed for obvious comparison reasons.