Medela lists three Hands-free Collection Cup tunnel sizes: 21 mm, 24 mm and 27 mm. The Swing Maxi Hands-free configuration includes 21 mm and 24 mm shields; Medela lists 27 mm as a separately available size.
Medela describes these measurements as tunnel sizes for its Hands-free Collection Cups. The chart below records the sizes named on the manufacturer’s product page and the package detail Medela gives for Swing Maxi Hands-free.
Medela-published size and package chart
| Tunnel size | Swing Maxi Hands-free package detail listed by Medela |
|---|---|
| 21 mm | Included |
| 24 mm | Included |
| 27 mm | Available separately |
Medela’s product information says the O-ring fits all three shield sizes. The included parts and size labels can depend on the exact pump configuration, so use the instructions for that product when identifying components.
This is a product specification chart, not a personal fit guide. Ask your doctor about breastfeeding or lactation questions.
See the Medela Hands-free cup compatibility chart and our breast pump guide. Browse postpartum and feeding.
Sources
Common questions
Which shield sizes does Medela list for Hands-free Collection Cups?
Medela lists 21 mm, 24 mm and 27 mm tunnel sizes.
Which sizes are included with Swing Maxi Hands-free?
Medela lists 21 mm and 24 mm shields in that configuration, with 27 mm available separately.