In the same way that the length of men's penises varies, the size and depth of women's vaginas also varies. This would suggest that any 'minimum' length of penis needed to satisfy a woman would depend on their vagina. There is certainly no specified length that would apply to all women.
Since friction is generally considered to be the key to pleasurable sex, a lot of women will say that they consider the girth of a man's penis to be more important than its length. More girth will cause more friction and sensation in the act of sex.
The average length of an erect human penis is estimated to be approximately between 5.1 and 5.9 inches. However this is not to say that anything below this threshold would be 'too small' to properly satisfy a woman. It is often stated that the quality of the sex rather than the size of the penis is what really matters. You should not worry about minimum penis sizes as it is something that should not hinder your sex life and something that is essentially beyond your control. This is because there is no consensus in the scientific community of any non-surgical technique that could permanently increase either the thickness or length of the erect penis that is already within a normal range.
Since friction is generally considered to be the key to pleasurable sex, a lot of women will say that they consider the girth of a man's penis to be more important than its length. More girth will cause more friction and sensation in the act of sex.
The average length of an erect human penis is estimated to be approximately between 5.1 and 5.9 inches. However this is not to say that anything below this threshold would be 'too small' to properly satisfy a woman. It is often stated that the quality of the sex rather than the size of the penis is what really matters. You should not worry about minimum penis sizes as it is something that should not hinder your sex life and something that is essentially beyond your control. This is because there is no consensus in the scientific community of any non-surgical technique that could permanently increase either the thickness or length of the erect penis that is already within a normal range.