From the new Bronco sports I've seen on the road they are closer to a escape or a new rav 4 than a explorer in size.they aren’t full sized Broncos... they are slightly smaller in size to a Gen 1 Bronco. Full sized Broncos refer to the 1978-1996 Bronco (Gen2-gen5) built on the F-150 platform. The new Bronco is on a Ranger platform so it’s being called a Mid Sized Bronco.
The Bronco sport is slightly larger than the Bronco II from the mid 1980’s -1993. The Ford Explorer replaced the Bronco II so it’s only acceptable that the new Bronco Sport be put onto an explorer frame.