What I can say as an older professional person (i. at 70% volume. Each individual bead shape isn?t identical to each other, some are thicker or skinnier (or shorter or taller). I?ve been looking for nice supportive racer back bra for ages to wear with certain dresses I usually have to wear a strapless bra with. I wore them to the gym, and while I was doing cardio and body-resistant work out, they still remained firmly intact inside my ear. The material dries quickly and do not smell like some flip flops do. Best value by far! for a coffee station. I ordered a half size up and they are slightly loose so it may be good to go a half size up. I bought these for my husband who usually wears Adidas sliders.