How do you know when you need a different breast flange size? Spectra breast pumps include the most commonly fitted flange size, 24mm breastshields . Although this is the most common size, many women will fit better in other sizes. A properly sized breast shield aka breast flange is important to ensure the best performance of your pump and the most milk output. An improperly fitted breast shield can hinder milk supply and cause discomfort. To determine the shield size you need, pump for five minutes using the standard size provided with your breast pump. Your nipple will expand while milk is being expressed, therefore it is important to measure after five minutes of pumping so that the size you select will provide adequate room. After five minutes, measure the diameter of the nipples at the base with a tape measure that uses millimeters. Click the link to access a printable tape measure . Ideally, you should select a shield size that is 2-3mm larger than this measurement, but up to...
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