These sleeves are available in Large size. Sleeves for CRE-C20 are not compatible with CRE-C10 and CRE-E10 OTCHA models. The Sony Closed Sleeve is compatible with the CRE-C20 Self-Fitting OTC Hearing Aid, providing comfortable and functional accessories. Each package contains 3 pairs of closed sleeves that are easy to replace on hearing aids and can be adapted to fit most ears and hearing needs. Sony CRE-S2CL Closed Sleeve for CRE-C20 Self-Fitting OTC Hearing Aid provides clear sound quality, supporting the performance of the C20 OTC hearing aids.