Listing lengths vary: individual pieces are shown from under 1 inch up to 30 inches. Extenders are specifically listed at 1 5/16 inches; 1 1/2 by 1/4 inches; 2 inches; and 3 by 1/2 inches. Check each product page for the exact length available.
Yes. Some listings are sold as multi‑strand separators and product titles indicate double and triple options; many clasps are described for holding multiple necklaces to create a layered look.
Magnetic and snap‑style connectors are described as very quick to attach and detach (one‑second or a simple snap). Hook, spring‑ring and lobster mechanisms require attaching each necklace to the hook or ring in sequence and take longer.