flower bracelet

single red rose clenched in glistering teeth and accessorized with a matching wristband.

Hopalong Cassidy watch.

Where I come from, we call boys who wear those things "woofters".

um...is this a serious answer?

Those are wrist corsages on the wrists of the women in the photo you posted.

You would not normally see boys/men wearing wrist corsages.

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In a situation where girls/women are wearing corsages/wrist corsages or carrying a bouquet of flowers, you might see men wearing a boutonniere on their jacket.

We call them buttonholes in the UK.

Your word is much more romantic though.

A corsage is a small bouquet of flowers worn on a woman's dress or worn around her wrist to a formal occasion, traditionally purchased by the woman's date. Corsages are now most commonly seen at prom or similar events. Sometimes incorrectly called corsages, flowers worn by men are traditionally known as buttonholes or boutonnieres.

Thank you~

When was the last time you heard it called a boutonnierre in the UK?