These are two separate rings that you can buy separately or as a pair.  
Options: 
Bottom of your finger
Top of your finger
Pair (bottom and top)
 
Sizes:
These rings are adjustable (open at the back). Please know your ring size to make the right choice between the small or large option. 
Bottom ring small (fits ring size 4-7)
Bottom ring large (fits ring size 8-11)
Top ring small (fits ring size 3-5)
Top ring large (fits ring size 6-8)
Pair large
Pair small
 
Materials
▽ 925 sterling silver