Thin Kids' Mattresses for a Shallow Crib

Which children's mattresses are thin enough for a shallow crib?

Lullaby Earth Breathe Safe Breathable Mini Crib Mattress: The maker gives dimensions of 23.5 by 37.5 by 3 inches, agreeing with Strolleria; the other store listing and Healthline give approximately 24 by 38 by 6 inches, so the sources disagree. One store listing says the mattress measures about 24 by 38 by 6 inches, which conflicts with the 3-inch thickness given by the maker and the other store. Moonlight Slumber Starlight Dream Crib Mattress (Compressed & Rolled): The mattress is 5 inches deep. Moonlight Slumber Little Dreamer Mini Crib Mattress: The mattress measures 24 inches by 38 inches by 5 inches. The review says the 5-inch depth is thicker than many mini crib mattresses, which some buyers may see as more supportive and others as a fit concern for shallower cribs.

ProductWhyDepthStagesWeight
1. Lullaby Earth Breathe Safe Breathable Mini Crib Mattress sold by strolleria.comThe maker gives dimensions of 23.5 by 37.5 by 3 inches, agreeing with Strolleria; the other store listing and Healthline give approximately 24 by 38 by 6 inches, so the sources disagree.The maker gives dimensions of 23.5 by 37.5 by 3 inches, agreeing with Strolleria; the other store listing and Healthline give approximately 24 by 38 by 6 inches, so the sources disagree. guideThe maker describes a two-stage mattress with a firm infant side and a cushion-firm toddler side; Healthline says it is not flippable, so the sources disagree. guideThe mattress weighs only 7 lbs thanks to a lightweight WaveSupport core, which makes sheet changes easier. guide
2. Moonlight Slumber Starlight Dream Crib Mattress (Compressed & Rolled) sold by megababiesusa.comThe mattress is 5 inches deep.The mattress is 5 inches deep. listingIt has a two-stage sleep system. listing-
3. Moonlight Slumber Little Dreamer Mini Crib Mattress sold by megababiesusa.comThe review says the 5-inch depth is thicker than many mini crib mattresses, which some buyers may see as more supportive and others as a fit concern for shallower cribs.The mattress measures 24 inches by 38 inches by 5 inches. listingThe dual-sided design is presented as a way to flip from a firmer infant side to a plusher toddler side instead of buying a second mattress. review-

Also cited in the text

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 2026-10-27T20:07:50.914Z.

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.