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.
ps — your 15% friends-of-gem code is waiting just below the sizing guide 💛
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.