Hate to be the barer of bad news but it does seem that size matters fellas. At least, if you’re planning on having kids. A new study suggests that men with smaller johnsons tend to be less fertile. Researchers say that over a period of three years – they found that men with slower swimmers tended to have a sugar stick that’s around a third of an inch shorter than those with heftier hoggers. So how small is too small? According to the data collected, men who were infertile had an average length of 4.92-inches compared to fertile men with 5.27-inches. Now you know.