How about a twist on your plain horseshoe, this is perfect when your not into sparkle but are over the plain!. This comes in Silver, Yellow Gold or Rose Gold, it is 16g which is 1.2 mm thick. And has 5 mm balls on each end.
 
Specifications
Ball Size: 5 mm each
Gauge: 16 g ( 1.2 mm)
Diameters Available: 
                                              ~ 6 mm
                                              ~ 8 mm
Base Material: Surgical Steel
Finishes Available: 
                                          ~ Silver
                                          ~ Yellow Gold Ion-Plated
                                          ~ Rose Gold Ion-Plated