Finished sizes vary: heights range from about 3.5 inches (very small display models) up to over 10 inches (larger builds). Typical widths are roughly 4.5–6.5 inches and depths about 3–5.5 inches.
Several listings include CPSC choking-hazard warnings for small parts. Many items also display suggested-age guidance to help determine suitability for younger children.
Most listings state no battery use—these sets are designed as non-electronic, hands-on toys.
Product details list ABS (Acrylonitrile Butadiene Styrene), generic “Plastic,” and food-grade MABS plastic.