size difference

Cam someone tell me the difference in size between a bantam, hybrid and large fowl.
I've kept bantam RIR's for many years and are considering changing to hybrids but want a smallish docile bird (as I don't want the neighbours to get upset by much noise). what do people think would be the best option and varieties.

The most docile ones I've had ar the hybrid brown and cream, like the Goldlines, Warrens and ISA's.  They are slightly larger than a bantam, but not as big as say the Orpingtons

They generally weigh between 1.75 and 2 kgs, but I've never measured their height!