I made this with the aim of achieving angelic cuteness. It might be a little long to use as a smartphone strap. I think it would be better to attach it to your bag as a keychain. I've used strong, durable twine because the strap would sometimes break when a smartphone was attached. Also, I've prioritized durability for the knots in the strap part, so the appearance might be a little noticeable, but I would appreciate your understanding. I hope we can connect!