No, they are smaller. The largest size is 30cm which is enough for me though. The most expensive one with that size costs 11,50€. Another delivery place has 32cm ones. Most expensive there is 9,40€. There is nothing inherently wrong with them. They aren't from an Italian restaurant though and aren't the same quality you would get in a real restaurant. They still taste good and satisfy your pizza cravings though. Delivery is free too if you're over the minimum order balance. From what I'd guess they are on the are more like those fast food pizza places like Pizza Hut or Domino's but I've ordered like maybe once from them so I'm not sure.
Maybe we both use deliveries differently. If I order something for delivery I don't expect Restaurant quality food. If your pizza is from a Italian restaurant and is really well made/restaurant quality I see why it's so expensive. For me delivery is more "fancy" than fast food but not as "fancy" as actually eating in a real restaurant
"Don't toy with me Nagatoro" and "Uzaki chan wants to hang out" are the 2 middle ones