Some places you can buy men's Jewelry and even women's jewelry and gold chains are.
Some places you can buy gold chains for men are Macy's, Zales, Kay Jewelers, Kohls.
Most chain lengths chosen for men typically fall at the collar bone, which is usually around 20 inches in length.
If the necklace includes a medallion, cross, or dog tag, a slightly longer length is suggested.
Multiple chains of varying lengths may be worn for a layered look.