maybe "Gold Dainty Necklace: Effortless Chic Every Day". Count words: Gold(1) Dainty(2) Necklace:(3) Effortless(4) Chic(5) Every(6) Day(7). That's 7 words, okay.

one sentence selling outcome: "Wear it solo or layered, and instantly elevate any outfit with timeless sparkle." That's one sentence.

£9