A: Please be advised there is a none removable middle divider and there are indents that will not allow a perfect dimension to provide. You will probably get approximately 2 sides of Length 16" X 4" to 4-1/2".
A: The 10 compartment case is a little deeper than the 6 compartment case.
A: The yellow dividers are removable for inner customization.
A: Every divider comes out of this 10 compartment Organizer. All but the center divider comes out of the 20 compartment Organizer. Don't know what is meant by 6-compartments.
A: Yes they aren’t cups but plastic dividers, the vertical piece has slots so you can divide the sections in half horizontally, there are 5 or 6 vertical pieces. All the dividers can be removed as needed.