There are 3 medals in this set. The front sides have an identical design of 3-cyclists (road, track and tandem). The reverse sides are all different from each other; (1) the gold has flags and Olympic rings with a different sport represented in each ring, (2) the bronze has an image of the Olympic Stadium with approximately 20 nations flags forming a raised pyramid, (3) the silver has a large view of a hand holding the Olympic Torch and the torch has several sports represented around the circumference. The diameter is 39mm (1 9/16 inches), the thickness is 2.6mm. See the picture gallery. The details of the medals are better than these pictures. 

Picture Gallery for this Item (click images to enlarge)
more details The reverse side of the Gold medal. There are 5 different sports depicted in the 5 rings.	more details The reverse side of the bronze medal illustrating the Olympic Stadium with about 20 nations falgs.	more details The silver medal showing a hand holding up the Olympic Torch. The torch has 12 different summer sports illustrated on the side.