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# Does it matter which day I measure myself?

Yes. Your bust can feel fuller in the days before your period, after a big meal, or during hormonal changes, for example during menopause. If you measure on a day when your body is extra swollen, the measurement can be misleading for the rest of the month. So measure on a completely ordinary day, ideally morning or late morning, and re-measure at another time if the number feels unexpected.