Supportive foam cup inserts for DIY lingerie and swimwear projects. Provide modesty and a rounded profile under fitted tops without visible seams. Compatible with knit fabrics; edges can be trimmed to suit neckline or armhole shape. Hand or machine sew into bras, camisoles and dance costumes. Pack contains two matching size C cups ready for installation. Suitable for home and classroom use; keep with core sewing notions for consistent results.