Abstract: An adjustable star and guide conveyor system having adjustable star wheels that accommodate various size containers and an adjustable centerguide assembly that varies the width of the corridor between the wheels and the guide. The star wheel assemblies each include coaxial upper and lower star wheels that cooperate to define the transfer pockets. The size and shape of the transfer pockets are adjusted by rotating the upper and lower wheels with respect to one another. The centerguide assembly includes a pair of siderails that are shaped to follow the contour of the star wheels. The siderails are movable toward and away from the star wheels to vary the width of the corridor between the centerguide assembly and the star wheels.