Thought they might be 32. I imagine they are comfortable on bad pavement. The last time I ran 32s was on a touring bike in 1990.
I ask about the 1x because it seems most of the gravel bikes these days have them. I think I would prefer a 2x for mixed surface rides. I have a 1x on my mountain bike and it's fine in the dirt, pretty wide range, but I really notice the gaps when I ride it on the road.