What better way to show your affection than with an anatomical heart! For someone special, whether that's a friend, partner or yourself!  
Measuring: 7cm by 4cm 
And weighing: 0.01kg (10g)
 
They are very lightweight.
This keychain is designed by me! (Then redesigned aaaand redesigned again) to print nicely!
It is 3D printed on my home printer and then I re-inforce the keyring hole with a grommet for longevity!