Color changing LED ring with 6ft wire leads. The board is 6mm wide. Each LED has a red, blue, and green die in it. To control the LEDs you will need a remote control.  The ringz are sold individually and picture shows the colors that the LEDs can make. 

6.1in.(155mm) OD with 51 LED $129.38 each

5.51in.(140mm) OD with 45 LED $117.00 each

4.72in.(120mm) OD with 39 LED $101.25 each

3.94in.(100mm) OD with 33 LED $91.13 each

3.15in.(80mm) OD with 27 LED $77.63 each

2.36in(60mm) OD with 21 LED $64.71 each