Is this real sterling silver?

Yes. The listing specifies sterling silver, which is 92.5% silver, and notes it is nickel-free. Sterling can tarnish over time, so store it dry and polish it occasionally.

What is a Singapore chain?

It is a twisted, rope-like chain where the links spiral around each other. That twist gives it more shine and a slightly thicker look than a cable chain of the same width.

Will a pendant fit on it?

Small and medium pendants work well. At 1.9 mm wide the chain is slim, so a heavy or wide-bail pendant will slide around and may strain the links.

Is 16 inches long enough for an adult?

It sits at the collarbone, which many people find short. If you prefer a chain below the collarbone, look for 18 inches or add an extender.

Does it work for sensitive skin?

The chain is listed as nickel-free, which helps people with nickel allergies. Sterling silver itself can still darken some skin, but that is tarnish, not an allergy.