If your jewelry wish-list is crammed with diamond rings and necklaces, it’s time to modernize — “crotch charms” are apparently the new in thing.

Japanese company BoDivas is pioneering the trend with its range of intimate bling called Beachtails.

The line is marketed as “sexy charms for bikini crotch,” and they pretty work as you’d expect.

Ranging in price from $19.50 to $22.50, the metallic chain comes with pretty stones on each end and is supposed to be worn through the crotch of bikini bottoms.

That leaves the gems hanging down each side of the wearer’s legs, because who doesn’t want some sparkle when they’re sunning themselves on the beach?

And before you start worrying about getting your money’s worth, Beachtails work just as well with other undies.

Apparently they can be worn with “panties, thongs, tangas and shorts”, so there’s no need to limit yourself.

The chain which goes inside bikini bottoms is made of stainless steel, with the dangle section about 1.5 inches long.

Among the designs are some which feature Swarovski crystals at the end, and they come in a range of colours like black, red and turquoise.

This isn’t the only jewellery the firm offers either.

There’s also nipple accessories, and something called the Ladies Clip. We’ll leave that to your imagination, but suffice to say it’s the same kind of idea as Beachtails but it goes inside. Yep, really.

Anyone not feeling brave enough to give them a go might be more comfortable trying glitter boobs, the trend which is still going strong.