Take a look at this Swim Bike Run Pewter Triathlon Ornament that I found, it was perfect for our tree and might just be perfect for your tree too!
It's 3" x 3", and lightweight, so it hangs beautifully and stands out nicely on a Christmas tree. This is gender neutral so it's a great item for either a male or female (of if you're like us, it represents multiple triathletes in the family!).
If you have a multisport athlete in your life, this is the perfect way to let them know how proud you are of their efforts and accomplishments.
I really wanted something that was high in quality, and that is probably what sold me on this one in particular. It did not disappoint! I know you'll be as pleased as I am.