Usual length and girth ratio

How much length usually goes with 6.0-6.25 inches of girth?

If your question is what length equates to a similar percentile as 6-6.25” girth, then I’d say somewhere between 8-8.5” which is somewhere in the 99th+ percentile. For ballpark estimates, I usually just refer to howlongismyschlong.com (because it’s such a catchy, easy-to-remember name) which links to this data . Just keep in mind that penises aren’t proportional and you may be more “girthy” relative to length) than average.

I think he is asking more like an ideal ratio. Girth is roughly 8/10 of length on average I think, so if your penis is 6” girthy anywhere near 7” length should look proportionated.