I made my first spice rack for myself when we moved into a small house and I couldn't find anything that held a lot of bottles in a small a space. Though each spice rack is one-of a-kind and made from a unique blend of vintage materials, they all have shelves that are 2 1/4 inches deep and 5 inches tall, enough space for most spice bottles. The top of the rack fits oil and vinegar bottles and the bottom has cup hooks underneath for utensils. The ones pictured below are all available for purchase. I can also make one to order to fit a particular space.
Measurements are listed in inches, Width x Height x Depth.