By raising items up to where you can spot them, our three-tiered shelf makes things in the back easier to find. It will expand to custom-fit your cabinet space. Each Expand-A-Shelf® features three tiers – your shelf surface creates a fourth storage tier. The Mega Expand-A-Shelf holds larger items like cans and expands from 13” to 25.” The Regular Expand-A-Shelf holds spice bottles and expands from 13” to 25”. The Mini Expand-A-Shelf will hold your medicine bottles or cosmetics and expands from 12” to 23″.