This is a 3d printed set of three risers. They can be printed in just about any color that you want. Just let me know at the time of purchase. Shown in the picture is a black base with white shelfs. They measure about 10 inches wide and the riser depth is about 3 inches. I just printed one to match a customer's logo in navy blue and peach. It turned out great.
These can be purchased separately.
A single riser is about 2.5 inches high with the same dimensions above.
The two shelf risers heights are about 2.5 in and 5 in
The three shelf riser heights are about 2.5, 5, 7.5 inches.
These three options are not listed here as singles but let me know if you need a single set and I will create another listing.