leg opening: 8.25"
My measurements are very different from yours. I wear 30" waist, but Kent's 30" pants were basically jeggins on me (except for the waist).
I took the rise up 2cm, seat out 4cm, and thighs out 4cm. Left the leg opening where it was. I think that is somewhere in the 7.5-7.75" range.
I actually had to have the thighs and seat taken in a bit. Leg opening was good for me. For my next one I'll bring the thighs and seat in 2cm. Maybe let the leg opening out 1cm.
I ordered my suit and then when Kent told me it was going to take a while for the standard one to be ready he asked which swatches he could send me with the suit. I just emailed hm the fabric numbers of the swatches I wanted.
Yes, or you can look at the price list at the bottom of the suit page.
The fabric is woven very tightly. It won't be truly waterproof like a rubber raincoat will be, but it'll breathe and look better as it's still 100% cotton. It should be enough for anything other than a hurricane.