which is the appropriate amount for finishing the model

Model Number: 933-3197

Switching Speed feature for easier and faster access to yard speeds

Unit Measures:11 1/2" x 2 3/8" x 2 5/16"

This is a Bar Mills 822 HO Scale Mooney's Plumbing Emporium Building Kit

USA Trains R15020A G Frisco Outsided Braced Box Cars (Red/Silver) #7813 ProductID_11551593 which is the appropriate amountThis is a USA Trains R15020A G Scale Frisco Outsided Braced Box Cars (Red Silver) #7813. Special Features: Highly Detailed One Piece Body, Operating Doors, Separately Molded Handrails, Ladders, Corner Steps & Brake Platform, Both Hook Loop and Knuckle Couplers Provided, Brass Brake Rod, Detailed Archbar Trucks, Quality Graphics, Authentic Paint Schemes and Length: 14 3 8 Approx. Condition: Factory New (C 9) Operational Status: Functional Original Box: