# Stroller seat size and weight

What are the size and weight of a stroller seat?

Cybex Gazelle S Second Seat: Owners say the double setup is only slightly wider than a single stroller and still fits doorways, lifts and pavements\. The second seat arrives folded and folds compactly enough to put in a car\. The full\-size seat is rated for a child up to 50 lb\. Joolz Day2 /Day3 Summer Seat: The store listing says the seat adapts to the Day3/\+ stroller\.

### 1. [Cybex Gazelle S Second Seat](/products/ucp/megababiesusa-com/7993857573118) (sold by megababiesusa\.com)

Owners say the double setup is only slightly wider than a single stroller and still fits doorways, lifts and pavements\.

- Size: Owners say the double setup is only slightly wider than a single stroller and still fits doorways, lifts and pavements\. (review) <https://forum.babyhome.com.tw/topic/5019478?page=1>
- Folded size: The second seat arrives folded and folds compactly enough to put in a car\. (review) <https://www.youtube.com/watch?v=-3r2f2oZjyU>
- Child weight limit: The full\-size seat is rated for a child up to 50 lb\. (listing) <https://top-stroll.myshopify.com/products.json>
- Compatibility: Cybex's US page says the seat unit attaches to the Gazelle stroller frame to carry a second child\. (guide) <https://www.cybex-online.com/en/us/p/10077356.html>

### 2. [Joolz Day2 /Day3 Summer Seat](/products/ucp/megababiesusa-com/5425561010329) (sold by megababiesusa\.com)

The store listing says the seat adapts to the Day3/\+ stroller\.

- Size: -
- Folded size: -
- Child weight limit: -
- Compatibility: The store listing says the seat adapts to the Day3/\+ stroller\. (listing) <https://top-stroll.myshopify.com/products.json>

Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. A dash means no checked fact fills that cell\.

Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\.

Written 2026-10-24T08:52:32.231Z.

This page is published by RoboTrunk, a store built for shopping agents.

The store named on this page sells the product and ships it. RoboTrunk is not
the seller and never holds the money.

Buying works in one path. RoboTrunk's tools prepare a checkout at that store,
then hand back a short-lived link. The person approves the total; once RoboTrunk
has checked the store's total against it, the person is given the checkout link to
tap in their own browser, or, if the person prefers and gives permission, their
agent may open the link and finish there, and payment always happens on the
store's own checkout page. RoboTrunk never takes the payment or sees a card.

Where the rest of this site is:

- /agent/story.md is what RoboTrunk is and how it works, in full.
- /agent/tools.json is every tool, its arguments and its answers.
- /agent/merchants is every store you can buy from through RoboTrunk.
- /products/ucp is every store's indexed products.
- /products/search is one search across every store, in plain words.

- [What RoboTrunk is](/agent/story.md)
- [Every tool, in your browser through WebMCP](/agent)
- [The tools and how to call them](/agent/tools.json)
- [The stores you can buy from](/agent/merchants)
- [Every store's products](/products/ucp)
- [Search every store at once](/products/search)