Amoena 171 is for use with Amoena 386 Contact 3E breast form. The back pad allows this attachable breast form to be worn traditionally in a pocketed bra. Foil covers the adhesive back during storage to protect against dirt and lint. Specify right or left. Sizes: 1-13. Order size 1 for breast form sizes 1-2; Order size 3 for form sizes 3-4; Order size 5 for form sizes 5-6; Order size 7 for form sizes 7-8; Order size 9 for breast form sizes 9-10. Order size 11 for form sizes 11-12. Order size 13 for breast form sizes 13-14.