with my most recent flush i flushed 2 pieces (i assume of a huge stone) that were about 3cm long and 1.5cm wide each. mind boggling, but it happens if you take your two doses of Epsom Salts . and yes i've flushed stones this big in the past. will say that i can feel the stones passing during the flush when they are this large. feels like little pinches in the liver/gallbladder area. in the morning huge stones come out whenever i feel this.
also, i think preparation for the cleanse is as important as the cleanse itself. drink chanca piedra tea to help break apart the big stones, and take chinese bitters and drink apple juice/cider to help get many more stones out at each flush. i do all 3 of these and it works wonders. i have done 35 liver flushes, but taking those 3 always brings the most success and REALLY breaks the stones in pieces.