Please insert into the pad pockets of bras and camisoles with cups. This is a set of 4 bra pads with a silk surface that touches the skin and an organic cotton backing. The structure from the surface that touches the skin is: Silk, Organic cotton, Organic cotton. Therefore, the thickness is thin, approximately 1.5mm. The surface that touches the skin is 100% silk, providing a comfortable, soft touch that is recommended for those with sensitive skin. These are handmade bra pads created for those with delicate skin, allowing them to be used with peace of mind. Diameter: 11cm Surface: 100% silk Backing: 100% organic cotton