The Heights Necklace

1. Use an existing necklace. Lay the necklace on a flat surface with the clasp unhooked and pull both ends of the chain to straighten it. Then, measure the entire chain, including the clasp, from end to end with a tape measure / ruler. If the measurement isn't a whole number, round up to the nearest inch.

2. Use a piece of string. Put a piece of soft string around your neck like a necklace and adjust it to your desired length. Then, mark where the ends meet with a pen or marker and measure the length of the string.