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Images: IKEA. Shown size and configuration may vary.

IKEA

KRUMMELUR Foam mattress for crib

Name: IKEA KRUMMELUR Foam mattress for crib
Brand: IKEA

Best for: Two-sided foam crib mattress

A 3⅛″ crib mattress with a wavy side and a firmer smooth side.

Good to know: Sized for IKEA cribs (27½″ × 52″).

Type: Foam
Height: 3.125″
Sizes: 1 ready-made

Your size

27½ × 52 in · 3.125″ tall

Where to get it

ikea.comOrder online · delivered to you See price
Kids and cribCrib size See the list

Returns: No sleep trial as such: IKEA US lets you exchange a mattress for another mattress once within 90 days; opened products can be returned within 180 days with proof of purchase (unopened within 365 days), but not if dirty, stained or damaged Details

We may earn a commission if you buy. Check the price for your exact size and height on the seller’s site.

The short version

Worth a look if

Two-sided foam crib mattress

Good

A 3⅛″ crib mattress with a wavy side and a firmer smooth side.
2 firmness choices: Medium firm (wavy side), Firmer (smooth side)
Trial: No sleep trial as such: IKEA US lets you exchange a mattress for another mattress once within 90 days; opened products can be returned within 180 days with proof of purchase (unopened within 365 days), but not if dirty, stained or damaged
Height: 3.125″

Think about

Sized for IKEA cribs (27½″ × 52″).
No owner reviews we could verify yet

Based on the maker’s published specs and terms, and the owner reviews linked below. We haven’t slept on it. Something wrong? Tell us.

What owners say

No owner reviews we can verify yet A small set of real reviews, each linked to its source. Not a star rating.

No owner feedback we can use yet.

What people liked

No supported praise summary in the sample.

What to weigh up

No substantive concern verified in this small sample. This is a gap in the evidence, not proof of no drawbacks.

Sources & sample limits

No usable owner sources. Sample: 0 owner reports.

Owner comments gathered from Reddit via RedditRecs were removed: RedditRecs and Reddit ask automated tools not to collect their content.

Research checked October 14, 2026. These are sourced observations, not our own product tests or a star rating.

Every size it comes in

Crib27½ × 52 inAs listed

Taken from the maker’s size options, in the inches it publishes. Tap a size to compare every mattress made in it. Sizes marked “as listed” don’t exactly match a standard size, so check your frame.

Price for every size

From the maker’s site on Oct 24, 2026. Prices change often, so check before you buy.

Size	Inches	Price
Crib	27.5 × 52	$99	See it

How it compares

Beside the most similar mattresses from other brands.

	KRUMMELUR Foam mattress for cribIKEA	The Grand RoyaleAlaskan King Bed Company	The OriginalAlaskan King Bed Company	The RoyaleAlaskan King Bed Company
Type	Foam	Foam	Foam	Foam
Queen price	—	$11,000	$3,800	$4,400
Height	3.125″	15″	11″	12″
Trial	See terms	See terms	See terms	See terms
Odd sizes	None	1	1	1
Expert reviews	None yet	None yet	None yet	None yet

What’s inside

1Polyester cover (removable, washable at 140°F)
2Polyurethane foam (1.7 lb/cu.ft.), wavy side and smooth side

Feel: Medium firm (wavy side), Firmer (smooth side)
Height: 3.125″
Custom sizes: Not offered for this model

Returns and ordering

Trial and returns

No sleep trial as such: IKEA US lets you exchange a mattress for another mattress once within 90 days; opened products can be returned within 180 days with proof of purchase (unopened within 365 days), but not if dirty, stained or damaged

Before you order

Measure inside the frame, not the old mattress
Check clearance above for the height you pick
Make sure your base supports it
Buy sheets in the same exact size

Questions

What is it made of?

3⅛″ two-sided foam crib mattress: a wavy medium-firm side and a smooth firmer side, with a hot-washable cover.

How firm is it?

Medium firm (wavy side), Firmer (smooth side) That’s the maker’s description; we haven’t measured it.

Which sizes and heights can I get?

1 sizes, 3.125″. See every size. Confirm your exact size and height with the seller.

Are the reviews about this exact mattress?

No owner reviews we can verify yet. Owner comments gathered from Reddit via RedditRecs were removed: RedditRecs and Reddit ask automated tools not to collect their content.

Where did this information come from?

Checked 2026-10-17. Specs and terms can change.