It has a four foot diameter (two foot radius)

This is an Excel 16049 5-1/2 Retractable Scribe -

This is a GCLaser 292-507 N Scale Brennon Seed Company - Kit (Laser-Cut Wood) 7-1/2 x 4-1/4 x 3-7/16 Neat addition to any industrial area

This is a USA Trains 22507 G Southern Pacific Daylight ALCO PA-1 Diesel Locomotive

The Trainz SKU for this item is P11456451

MTH 20-69280 O Santa Fe 70' ABS 2 Car Baggage/Coach Passenger Car (Ribbed) ProductID_12274336 It has a four footThis is a MTH 20 69280 O Santa Fe 70' ABS 2 Car Baggage Coach Passenger Car (Ribbed). Features: Intricately Detailed, Durable ABS Bodies Stamped Metal Floors Detailed Car Undercarriage Colorful, Attractive Paint Schemes Metal Wheels and Axles Diecast 4 Wheel Trucks Fast Angle Wheel Sets Needle Point Axles (2) Operating Diecast Metal Couplers O Scale Kadee Compatible Coupler Mounting Pads Constant Voltage Overhead LED Interior Lighting End of Car