You're selling fashion, not a story, so I would focus on platforms that show that off. I would start with Instagram and Pinterest, and consider other platforms as well. If the fashion accessory does more than immediately meets the eye, consider a short video (ideally under 30s), 3-4 pics in one, or a short comment describing what makes it special.
Again, though, this is fashion, and the visual appeal should be immediate. Read up on how to build a following on those channels, but the key is most often to engage others. Identify key influencers, like/follow/share their content, and reach out to them to see if they'd be interested in trying out your product. If they ask for a small payment to show off your product, consider it. A small budget is infinitely better than no budget. Also consider straight-up social advertising, where initial buys can be very low.