I have 2 nine inch banneton that I use: https://smile.amazon.com/dp/B07F6TWB8W/ref=cm_sw_r_apan_i_FKA4Y1KNW14T1T1K7PNA?psc=1

I found the key to rise and a good ear is a Dutch oven: https://smile.amazon.com/dp/B000LEXR0K/ref=cm_sw_r_apan_i_TVSP4EH5AGKPVPB27KNP?_encoding=UTF8&psc=1