I'm a big fella with a big head and big ears, they do touch the pad layer on the inside somewhat. I don't find it distracting or uncomfortable, personally, and I had ample time to use these in the hotter summer months this year, never plugged my AC in this year but kept the fans handy
My Audio Technica A990Z become unusable during those months, just too much heat retention, makes my head sweaty where it contacts. But I found the DT-700 Pro X's cushy velour and foam to breath WAY better than the pleather and foam on the A990Z. In fact I felt they were not especially different feeling to wear versus the DT-900 Pro X. That isn't to say that the DT-880/990 Premium Edition cans aren't even more pleasant in the summer months because of their looser fit and also-very-good breathability, they were the most comfortable during the summer for me, but I used the DT-700/900 Pro X plenty too and didn't feel uncomfortable or sweaty.