A product selection and grouping system for the metering, selection, grouping and accumulation of varying size and/or configuration products into packs for packing in a substantially continuous motion operation is provided. The product selection and grouping system includes a metering station that receives the products in a substantially continuous line of flow from a product infeed, and meters the line of products to selectively form a series of spaces therebetween. The metered products are formed and fed to a product grouping conveyor in groups of sets a selected number of products, and are engaged by laning flights of a laning unit, which transfer the product groups to selected ones of a series of lanes defined along the product grouping conveyor. The groups of products are accumulated for transfer to a downstream packing machine.