I recently renovated our upstairs bathroom which included a fresh new toilet. We raised the flange to flush with floor level (technically a hairline above) and placed the wax gasket to the base of the toilet as per manufacturer instructions. It was pretty hot that day and the wax was extremely malleable.
When setting the toilet, we felt little to no resistance from the wax gasket. Past toilet installs I've done I used an oversized wax ring just to be sure, but my brother insisted on using the wax ring that came with the toilet. I flushed a few times, no leaks appearing anywhere. Toilet water level decreases a bit after a flush but stays at that level (assuming toilet flange).
Just wanted to see if not feeling a lot of resistance from the gasket when setting the toilet is OK.
Best Answer
From my experience, the wax rings of today are a little softer than the ones years ago and settle easier. Using an oversized ring is bad because it can squish out and impede drainage when flushing. You were smart to raise the flange a hairline above the finished floor as that will also ensure a proper fit. Using the one that came with the toilet was also smart because the rest of your directions would be based on the ring they included. You probably caulked around the toilet after setting it in place. I have always left a weep hole in the back just in case a ring started to fail, you'd see signs of leakage.