There are a number of variations on flanges (aka breast shields) available. Flange sizing can be very important, click here for a sizing guide. Flanges are available for most brands of breast pumps, including Medela, Spectra, Pumpables, Ameda, and Eonion.

Note that there is no guarantee that any product will help you - you may need to test out a few items to find something that works for you