Hello Thanks for your query,based on the facts that you have posted it appears that you have problem of early ejaculation and not premature ejaculation. First off all let me tell you that premature ejaculation is a term defined ,when one gets ejaculation within one minute of penetration of vagina while having a sexual intercourse with female partner and not related to masturbation. What you are getting is early ejaculation due to sexual stimulation and it is mostly due to excitement and anxiety. As regards length and girth of your penis in flaccid state it is within normal range.Please note that the length and girth of penis in flaccid state has no significance at all . It is hardness of the penis on erection that is important for sexual satisfaction of both the partners and to have enjoyable sex. I think you should not have any problem to satisfy your female partner, D.Patil.