The majority of their WWII figures are 1/30 scale, being about 65 mm high, but the figures that go into the vehicles are sometimes slightly smaller. However most of their other ranges are in 1/32 scale.
The ad pics are most often production items except for very rare occasions when they are pre-productions, so what you see is usually what you get.
Most of their vehicles especially the tanks are made from polystone which is a resin and calcium carbonate (marble dust) compound that is rather heavy. However some models are metal (motor bikes) and some also have resin or plastic parts. The tracks do not move as they are static models for adult collectors, but some members here are more "mature" than others
King & Country are made in Hong Kong and the main K & C website originates from there as well. However Treefrog Treasures are a US dealer and their website can be accessed via the link at the top of each page, prices in their SHOP are the same as on the dedicated K & C site.