Bought 2 sets to stack for 8 tiers...glad it worked out! Love the updated look in our entryway so each family member can keep a few of their most-used shoes by the door & guests' shoes from off the floor. Pics for people to see what it looks like if they try 6 or 8 tiers. It could fit more than 3 pairs per shelf if we tried/added sandals. Just make sure you pick the most stable stack for the bottom.