I have always thought I'm pretty average size wise, (5-5 1/2), however I usually can't last very long, usually about 4 minutes. My gf and I have been together for about a year now, and we have never outright discussed my stamina. The other day out of the blue, she mentioned that she "might have found something to help me last longer" and proceeded to show me some sleeves. I'm open to the idea and have some on order. I couldn't fine exactly what I wanted, except for one size in a 3 pack. Once I told her that and she realized the other 2 were quite a bit bigger than me, I could see a certain light shine in her eyes. I know that look and she's definitely intrigued by the bigger ones.