Sex is more psychology than sizeology. Consider enjoying being small and celebrating it, maximizing it. Pleasure her with a dildo that fits her vagina. If that means a dildo twice your size, that's all the more exciting. Talk with her during the lovemaking, saying things like, "Honey, how does that feel? Is that filling you?" In no time, she will reward you for your generosity. Most women will tolerate a man wearing a penis extension but their heart isn't into it. They would rather be serviced by a nice, high quality dildo and then reciprocate after they orgasm. My experience is to give her a wonderful sensual dildo orgasm, then follow up with some oral and then having sex with her with just your penis inside her. The loose, warm feeling of her freshly orgasmed vagina will delight you and you get to cum inside her with 100% sensation.