Recommend using a ruler on each side to ensure everything is aligned. Give this game a chance you will not dissatisfied! Mine are approximately 1” in diameter, and the mountI can go smaller and much larger. Secondly, when paired. Let me just explain how these work and how they fit into my life. I purchased the alvacado and size medium. And maybe that outweighs the mediocre performance of the noise cancellation?———————————————————Review update November 17, 2019I returned these and dropped my rating from 4 stars to 3. =======================Rating Breakdown (5/5)Product Quality: 5Ease of use: 5Performance: 5Value: 5Overall: 5 Loved the look of these sandals, but had to return as the molded footbed was literally painful just walking around in the house. Easily adjustable.