Reducing Inserts Standard size by Ameda priced right and ready to ship immediately. The reducing inserts are flexible and comfortable and fit any Ameda breast shield. These are great for small breasted women. The insert reduces the flange diameter and nipple tunnel diameter making smaller breasted women more comfortable. These reducing inserts can be used with any Ameda Breast Pump. Order today and you will be on your way to a more effective and comfortable feeding for you and your baby.