The 8 slotted shoe cabinet is crowded for mens shoes.  However I know they make the larger slotted shelf because two different pieces of the shelving arrived.  (one was for the 8 shelf and the other was for the 6 shelf unit)  The 6 shelf unit provides larger openings to accommodate mens and taller shoes.  I would recommend the 6 shelf unit.  I had to call the company and order a divider at that time just so I could complete the assembly of the shoe cubbie.   I was not aware of the measurements for each slot.  I should of asked them to send the 6 slot divider.  Very accommodating with sending the divider.  Thanks