This is the Glass Display Dome and Base by Woodland Scenics.
Each of these delightful HO scale Mini-Scenes adds life and realism to any layout. each Mini-Scene tells a complete story, prefect for miniature scene collectors and enthusiasts. Complete kits contain the pewter castings, landscaping materials, and easy-to-follow instructions. Assemble and then finish with Mini-Scene Paint Set and Pewter Patina Finish. Miniature lovers also can enjoy building and finishing these scenes to display in the 3" diameter Glass Display Dome and Base.
Glass Dome is 3" diameter x 4 1/4" high (7.62 cm x 10.7 cm) and Plastic Base is 1/2" (1.27 cm ) high.