Is this chain real sterling silver?

Yes. It is 925 sterling silver and stamped .925. Sterling silver is 92.5 percent silver alloyed with other metals for strength.

Will it irritate my skin?

Sterling silver is nickel free, so it is a reasonable choice for people who react to nickel. Anyone with a known silver allergy should still be careful.

Which length should I pick?

18 and 20 inches sit near the collarbone; 22 and 24 inches hang lower over a shirt. The longer lengths also weigh more, from about 20g at 18 inches to about 27g at 24 inches.

Does sterling silver tarnish?

Yes, sterling silver darkens over time when exposed to air and moisture. Wipe it with a silver polishing cloth and store it dry to keep the shine.

Can I wear a pendant on it?

A 7mm curb chain is thick and heavy for most pendants. It works best worn on its own or with a light charm on a bail wide enough for the links.

How do I care for the lobster clasp?

Keep the clasp clean and check that it closes fully. A tight closure reduces catching on hair and fabric, but a bent clasp should be repaired before wearing.