a cylinder removably positioned directly about the selected user finger;

means for determining a ring size of the selected user finger, said ring size determining means being housed within an interior of said cylinder and connected directly thereto; and

means for visually displaying the determined ring size of the selected user finger, said visual displaying means being directly connected to an outer surface of said cylinder and further being electrically coupled to said ring size determining means respectively;

wherein the ring size of the user is automatically displayed by said visual displaying means after said ring size determining means calculates the ring size of the selected user finger;

wherein said cylinder comprises

a middle section having axially opposed top and bottom ends, said top and bottom ends respectively having threaded outer surfaces, said threaded outer surfaces extending about an entire circumference thereof;

coextensively shaped top and bottom sections respectively, said top section and said bottom section and said middle section having equally sized diameters respectively, said top and bottom sections being independently and threadably attached to said top and bottom ends of said middle section;

a motorized pump housed within said interior of said cylinder;

a power source electrically coupled to said pump;

a first toggle switch electrically coupled to said pump and said power source respectively, said first toggle switch being disposed on said exterior surface of said cylinder;

a first one-way valve electrically coupled to said first toggle switch and said pump respectively, said first one-way valve being opened when said first toggle switch actuates said pump;

a cylinder-shaped air bladder having a hollow chamber formed therein, said air bladder being directly coupled to said first one-way valve and an inner surface of said middle section of said cylinder respectively, said air bladder being coextensively shaped with said middle section of said cylinder, said air bladder being formed from a durably resilient material;

wherein said pump introduces a quantity of air into said hollow chamber of said air bladder via said first one-way valve when the user manipulates said first toggle switch during operating conditions, said first one-way valve and said first toggle switch cooperating to prohibit said quantity of air from prematurely and undesirably exiting said air bladder, said air bladder having an inner surface expanded toward a centrally registered axis thereof and about the selected user finger when said quantity of air is introduced into said hollow chamber of said air bladder, an internal air pressure of said air bladder being increased to a predetermined level above an external ambient air pressure level during operating conditions;

a pressure sensor attached directly to a top portion of said inner surface of said air bladder and further being electrically coupled to said power source, said sensor contacting the selected user finger when said air bladder expands, said sensor generating and transmitting an output signal based upon the instant diameter of said air bladder when said sensor contacts the selected user finger; and