This is a quick mask clip that I designed for under ear use. I wear glasses and swap masks frequently so having a clip that I can wear comfortably but also take on and off quickly has been helpful. It is around 35mm x 25mm x 0.5mm which makes it flexible and small. I like to attach it to one side of the mask first then put the mask around my head using two fingers to hold the other side of the mask a little open. With the curved shape, it should be easy to close the mask loops and have it attach to the holes. The holes should be small enough to give a tactile feedback on whether it is clipped or not. Thanks!