Small bell in your choice of color. Bells measure 1 1/4 inch at the widest point. Bell includes a key ring for attachment, and I suggest you also buy a spring gate ring for easy removal.

Colors available:

Silver - shiny
Gold - shiny
Red - shiny
Light Blue - shiny
Purple - shiny
Fuchsia - shiny
White - shiny

Light Green - matte finish
Red (fuchsia toned) - matte finish
Olive Green - matte finish