find your fit
most pumping pain is a fit problem, not a you problem. the wrong flange size can mean sore nipples, less milk, and giving up sooner than you wanted. here's how to get it right in two minutes.
how to measure
1. stimulate your nipple first (don't skip this step!)
2. find the hole on your gem fit card — or measure with a ruler — that fits the base of your nipple without squeezing
3. measure both sides — they're often different
4. remeasure now and then; sizes change through your journey
your gem fit
under 14 mm — message us first
14–15 mm — 18 mm flange
16–18 mm — 20 mm flange
19–20 mm — 22 mm flange
21–23 mm — 24 mm breast shield
over 23 mm — message us first
every gem includes 18 · 20 · 22 mm flanges + a 24 mm breast shield.
your friends-of-gem rate
you met us in person — so here's 15% off your gem. pop your email in below and we'll send your code.