Proper toilet flange height , Which Wax ring do I use?! (FACTS!) 

Very informative and explained for the beginner to understand!

I used the Korky foam/rubber one that you had in the video on the last install I did and it seemed to work good. Haven't noticed any leaks. If I remember correctly, the flange was on the low side on that one. I'm going to try it again on the current install I'm doing. I have the flange installed on top of vinyl plank just like in the video and it's the one with the stainless steel flange just like in the video. I bought that one and one that was all PVC, but, went with the stainless steel one because it looked like it would stick up just slightly over 1/4" above the finished floor, which is what I heard was recommended. The PVC one was much tall. More like 1/2" and I was afraid the toilet would rock had I gone with that one. The Korky seal has two pieces of foam and a piece of rubber. One piece of foam is thicker and the other is thinner. So, you can use either one, or both. I think it was around $11. So, it is more expensive than the wax ones, but, you don't have to worry about squishing the wax. So, I figured it was worth the extra money to have something where you could take the toilet off and adjust if necessary.

Every wax ring that has a horn, when I remove the horn is cracked. Every. Single. One. And yes. Like all you guys, I’ve changed out a lot of comodes.

He says " this flange must sit on top of finished floor " BUT He doesn't say with flange he's using.

My toilet has been leaking, ever since I changed the toilet, My flange is lower then the floor! So my flange needs to be taller!