I made this necklace, it just fit my head in, and you can see in the picture the size.

dont print smaller as it may not work.

the two hands are making a heart together,

i also add another version that the two hands hold a heart. you can paint it red, as i try not to use AMS so wont be so many waste materials.

if it is too short for you, you may consider remove one joint and you can add other materials in.

enjoy