These shelves are PERFECT for organizing the spice cabinet.  They fit perfectly depth-wise for a standard upper cabinet.  Just need to get the right selection of widths to fit the space you have.  You can fit so much more and with the sliding shelves, you can reach everything so easily instead of having to take everything out when you want something the back.  They are far better than the tiered racks because there’s very little wasted space with these.  Love them!