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Nipple Sizing Guide

The sizing guide

how to measure your nipple

Hey mama, size matters. The right fit means a more comfortable pump and better output, and your size can change throughout your breastfeeding journey.

For the LACEVO S70 in-bra breast pump

01

why size matters

We can't stress to you enough the importance of measuring your nipples properly before you first use your pump.

Incorrect fitting can cause pain, nipple trauma and damage, low milk supply, reduction of output and cause mastitis. Using the correct fitting flange and size insert will give you the most comfortable and effective pump session.

Most mothers are much smaller than the standard 24mm flange.

A LACEVO flange with a 17mm insert
02

in every S70

So you can comfortably use your pump straight out of the box.

Standard24mm

Silicone flange, included with your pump

In your sizing kit5 inserts

2 x flange inserts in 13, 15, 17, 19 and 21mm

Available to purchase11 sizes

Flange inserts from 11mm to 21mm

The LACEVO personal sizing studio with flange inserts and nipple measuring tool
Your personal sizing studio

everything you need to find your fit

  • 01Mirrored box
  • 02Silicone nipple measuring tool
  • 032 x flange inserts in 13, 15, 17, 19 and 21mm
  • 04Measuring instructions
03

how to measure

Measure before you first use your pump, and measure both sides.

Diagram showing where to measure: the base of the nipple, not the areola The LACEVO silicone nipple measuring tool Diagram showing the nipple width to measure
  1. Set upOpen your LACEVO sizing kit. Remove the plastic film from the mirror and position yourself so you can easily see your breasts in the mirror.
  2. Perk upTweak your nipple gently so it perks up a little before measuring.
  3. Measure the basePlace your nipple into the size on the silicone nipple measuring tool you think might fit. Keep checking the sizes until you find the smallest one that fits comfortably. Measure the base of your nipple, not your areola.
  4. Check the fitThe best size will fit around your nipple closely (no areola) but still be able to move freely when you take the measuring tool on and off.
  5. Both sidesMeasure both nipples, as they can be different sizes.
04

find your insert

Select the correct flange size or insert for your measurement.

If you measured We recommend you try Where to find
10-11mm 11mm flange insert Available to purchase
11-12mm 12mm flange insert Available to purchase
12-13mm 13mm flange insert In your sizing kit
13-14mm 14mm flange insert Available to purchase
14-15mm 15mm flange insert In your sizing kit
15-16mm 16mm flange insert Available to purchase
16-17mm 17mm flange insert In your sizing kit
17-18mm 18mm flange insert Available to purchase
18-19mm 19mm flange insert In your sizing kit
19-20mm 20mm flange insert Available to purchase
20-21mm 21mm flange insert In your sizing kit
22-24mm 24mm flange With your pump
Everybody's nipples have different elasticity and can behave differently when pumping. You may find that you need to try a size up or down from what you measure.
05

fit and align

01

fit your insert

With clean hands, push the insert into the 24mm flange with your thumbs until it sits flat in the tunnel.

02

align

Centre your nipple in the flange or insert tunnel as you bring the pump to your breast. Everyone is different, so try:

  • AUpright, lift the top of your breast up
  • BUpright, lift your breast up from underneath
  • CLean forward to dangle your breast over the flange
TipGently stimulating your nipple so it perks up can help you see and centre it.
03

secure

Once your nipple is centred, firmly press the pump against your breast and pull your bra over it. We recommend a full coverage nursing bra to keep the pump firm and upright.

Know the signs

pumping should never be painful

Your size can change. If something feels off, stop and check your fit.

minimal or no milk

The wrong size can affect your output.

continual discomfort

Check your flange size and alignment.

pain

Stop and check your flange size, alignment, positioning and suction level.

06

tips

  1. Wait an hourIt is best to wait at least an hour after pumping to measure.
  2. Let swelling settleIf you have been using the wrong shield size, your nipples can be very red and swollen. Make sure to wait until the swelling subsides.
  1. Reduce frictionCoconut or olive oil can be used to lubricate your nipples when pumping to avoid friction.
  2. Check againYour sizing can change throughout your breastfeeding journey, so check it from time to time, especially if you have any pain or see a change in output.
LACEVO's in-house IBCLC
Need help?

book in with our in-house IBCLC

Unsure about your sizing, expressing little milk or still uncomfortable? Get expert advice before you pump another session.

Book an IBCLC

None of the times suit? Send us an email at hello@lacevo.com. We will respond within 24 hours.

find your fit

Shop flange insertsReplacement parts guide
Please note

It should never be uncomfortable to pump. If you have any pain or see a change in output, stop and check your fit.

Source

Adapted from the LACEVO S70 sizing instructions.

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1 year warranty for all electronics, 90 days for all replacement parts

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