Is a 6 in by 5 in pouch enough to hold one color of single convex stones? I thought pouch would be better to store and carry than bowl. If not, what size Do you think will be enough

I know that some people at club use tupperware containers to hold stones, so that they stay contained properly. I have also seen a cheap set that used cloth bags. If something like that is preferable, you could probably get away with Crown Royal bags, but I'd be concerned that shaking the bag in moving it could dent or nick stones.

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Someday I want to be strong enough to earn KGS[-].

If you specify the dimensions of the stones, this sounds almost like an interview question...

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be immersed

the dimension is size 4 yunzi, 5mm height and 22.5 mm wide.

Can 5 in by 6 in Large size pouch hold them just right? not too small but not too big either

I guess Kirby won't be hiring you anytime soon...

If there're 181 black and 180 white stones in a pouch, what's the probability that 5 stones taken out at random will all be white?

a litle less than 1/ 32 (2^-5)
if you want to be exact

180 x 179 x 178 x 177 x 176 /(361 x 360 x359 x358 x 357)

a little less than 3%

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Promotor and Librarian of Sensei's Library

I've used lens pouches and climber's chalk bags.

bogiesan

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David Bogie, Boise ID
I play go, I ride a recumbent, of course I use Macintosh.