I purchased the 11, 12, 13cm Yamada Hoaks for my 36cm x 1.6mm Yamada round bottom wok (see my other review). I think the advise to use the 11cm with a smaller wok is good, I will be giving the 11cm and 13cm as a gifts to friends and keeping the 12cm for myself because it is the perfect size for 36cm wok. I am glad I could get a matching hoak for my wok, I also got the wok strainer too!
The 12cm hoak is the prefect size for my 36cm Yamada wok (see my other review too). I like how I was able to purchase a matching hoak and wok from the same manufacturer. I also purchased the wok strainer too