This is a bikini from the era when FOREVER21 first came to Japan. I didn't wear it in the water, but I wore it with dresses or when the bra straps were visible. It can also be used for fashion! It's a Japanese size M. Geometric navy and white triangle bikini bra with adjustable straps. - Design: Geometric triangle bikini bra - Color: Navy and white combination - Straps: Thin, adjustable straps - Style: Separate swimwear - Material: Stretchy swimwear material Thank you for looking.