A ring of protection increases the wearer’s armor class value and saving throws versus all forms of attack. 

A +1 ring raises AC by 1, say from 10 to 9, and gives a bonus of +1 on saving throw die rolls. 

The magical properties of a ring of protection are cumulative with all other magical items of protection except as follows:

1. 1. The ring does not add to armor value if magical armor is worn, although it does add to saving throw die rolls.

   2. More than one ring of protection operating on the same person, or in the same area, do not combine protection; only one—the strongest, if applicable—will function, so a pair of +2 protection rings are still only +2.

To determine the value of the protection ring use the table below:

The radius bonus of 5 ft. extends to all creatures within its circle, but applies only to their saving throws, i.e. only the ring wearer gains armor class additions.