The transit of KOI 408.05 in front of its host star has 1555 ppm (parts-per-million) transit depth and transit duration of about 16.7 hours. From the transit depth, the size of KOI 408.05 is estimated to be ~4.92 times the radius of Earth. With these properties, KOI 408.05 is a warm Neptune-sized planet in the habitable zone of its host star. Although KOI 408.05 is expected to be like Neptune with a think hydrogen-helium envelope, a large moon in orbit around it can potentially be habitable.
KOI 290.02 is a scorchingly hot Earth-sized planet with ~1.29 times the radius of Earth in a 6.828 day orbit around a relatively luminous host star at 0.078 AU. Its equilibrium temperature is predicted to be 1654 K and it receives ~1015 times the amount of flux Earth gets from the Sun. KOI 488.02 is also an Earth-sized planet with ~1.14 times the radius of Earth in a 17.39 day orbit around its host star at 0.119 AU. Its equilibrium temperature is predicted to be 736 K and it receives ~43 times the amount of flux Earth gets from the Sun.
Kunimoto et al. (2016), “Lifting Transit Signals from the Kepler Noise Floor: I. Discovery of a Warm Neptune”