Can anyone tell me how big this cock is?
If the phone is 4.6 inches in real life:
Measured in this photo it comes out to about 1.375 inches, or around 3.35 times smaller than it's actual length.
Measuring the cock is a bit more difficult as it isn't clear that the whole length is visible and there's the slight problem of measuring a flat picture when the actual cock is curved slightly (esp. the glans) which will of course effect the actual length, but giving a generous allowance above the roughly 2" visible to account for that I'd say 2.125 inches is a fair estimate for the length of the cock in that picture.
Now since the cock and phone are in the same area of the photo on the same plane and next to each other, they should be subject to the same rate of compression, which is 3.35 times smaller than actual length.
3.35 x 2.125 = 7.12 inches.
I'll say it's around 7" long. As far as girth it certain looks like between 6"-7".