Its for 28mm gaming, scale is roughly 1/50 - 1/56 I guess. Its hard to tell since 28mm is so ambiguous. I do know that my S Scale trains which are 1/64 look good with these buildings while 1/48 scale (standard gauge anyway) tend to look way to big (On3 is a whole different story)
This is out of Sarissa's Old West Heroic line, their regular Old West line is smaller.