I ended up staying at this hotel last weekend and I would go back. I had a lengthy email correspondence with the hotel and was informed that their largest standard rooms are 19, 29, 39 and 49. She said that they measured 35 sqm with a 4 sqm bathroom. (I didn't bring a tape measurer - but I was pleased with the size.) I found the decor lovely. There were 2 twin beds pushed together with a smoked mirror over the bed, desk, chair, side chair and stocked mini bar under the TV. Nice little touches like potpourri and Louis XIV period etchings. I'd estimate that there was about 3 to 4 feet walking room between the bed and the walls. The toilet was in it's own small room - all marbled and the bathroom was a good size. Rust colored marble on the floors and walls with a pretty mosaic tile display on the floor. The counter was black marble and I'd estimate about 3 ft counter space not including the sink. There was also a black marble half shelf above this counter - so I had plenty of room for my stuff. There was also a make up mirror (as well as the bathrobe). The tub was deep and normal sized in length and width and had the shower that could also be used as a hand held. As it was COLD outside I found the room's warmth a plus.
But the best thing about this room was that if you opened the windows, looked outside and turned your head to the right - there was Notre Dame.
I found the front desk staff nice and helpful and the lounge/bar area and the breakfast area was very pretty. I only ate there one morning. The pastries were lovely but the scrambled eggs, bacon and sausage were pretty bad.
Considering I got this room at €120 I was extremely pleased with it and would definitely go back.