Is gold filled the same as gold plated?

No. Gold filled has a much thicker layer of 14K gold mechanically bonded to a base metal, so it lasts far longer than plating. It is still not solid gold and can eventually wear through at constant-friction points.

What size pendant can this chain hold?

The links are 2x1.5mm and the chain is fine, so it suits small, light pendants and charms. A heavy or large pendant can stretch or kink the links.

What length is it and where does it sit?

It is 18 inches, which typically falls at the collarbone on most adults. There is no extender, so the fit is fixed.

What clasp does it have?

A spring ring clasp. It is compact and secure when closed, but the opening is small, which some people find fiddly to work one-handed.

Can I attach charms to it?

Yes, it is listed as compatible with 24-gauge jump rings. Keep added charms small and light to protect the thin links.

Will the rose color fade?

The rose tone comes from the 14K gold layer, so it does not flake like plating. Over years, rubbing against skin and other jewelry can thin the layer at contact points.