This size is the medium, designed to give a perfect fit to men with averages penis sizes. The walls of the sleeve are a little less thick as compare to those of size A, meaning that a little more room is left to accommodate average sizes. The actual measurements of penis size that would actually fit in this sleeve are girth ranging between 4 to 5.5 inches (10-14 cm). Any length of penis will be okay so it is not so much of a consideration. Majority of men usually fall under this category, making size B the most popular sleeve. It is important to note that all the Autoblow 2 sleeves have a similar external diameter.
Size C is meant for those with more than average penis size. The walls of the sleeve are the thinnest of the three, giving it more volume to accommodate the large penis size. It is a perfect choice for anyone having penis girth ranging between 5.5 inches to 6.5 inches in girth. As with all the sleeves, the length of the penis does not play a major role in determining the sleeve choice. It is important to note that all the Autoblow 2 sleeves have a similar external diameter.