What is the Standard Size of a Crib Mattress?

The safest size of baby cribs and crib mattresses is determined by the federal government. The Consumer Products Safety Commission (CPSC) requires all full-size baby crib mattresses to be at least 27 and ¼ inches in width by 51 and ¼ inches in length, with a maximum thickness of six inches. But for cribs, the standard size isn’t as simple.

What is the Standard Size of a Baby Crib?

The CPSC requires that full-size baby cribs have a standard width of 28 inches and a standard height of 52 and ⅜ inches, but with a “pull or minus factor” of ⅝ inches. Because of this variation, it’s important to look for the recommended mattress size listed on the crib’s box and/or assembly instructions. All Delta Children, Serta and Beautyrest crib mattresses are compatible with all Delta Children cribs, making it easier to buy the products that are safe for your little one’s nursery.

How Can I Tell if a Crib Mattress Fits in my Crib?

Crib mattresses should fit very snug or moderately snug in the crib. No more than two fingers of space should exist between the side of the mattress and the crib frame. A mattress that is too small for the crib could be a suffocation and entrapment hazard.

How Firm Should a Crib Mattress Be?

The firmer, the better when it comes to crib mattresses. Soft surfaces can pose a suffocation hazard and increase your baby’s risk of Sudden Infant Death Syndrome (SIDS). You can test a how firm a mattress is by pressing on its center and edges. When you release pressure, it should snap back immediately.

Delta Children

Delta Children Twinkle Stars 4-inch Firm Mini Crib Mattress - 38 x 24 x 4 in, Waterproof Vinyl Cover, Royal Blue, Greenguard Gold

5/5 (1)

$39.99$49.99-20%

In Stock

The Delta Children Twinkle Stars 4-inch Mini Crib Mattress is a firm mini-crib mattress designed for use in most mini and portable cribs (38 x 24 x 4 in; not for standard cribs or Pack ’n Plays). It has a hypoallergenic fiber core made from recycled bottles for firm support, a durable waterproof vinyl cover that wipes clean, a product weight of 3.9 lb (shipping weight 5.8 lb), is GREENGUARD Gold certified, meets flammability, lead, phthalate and CPSIA testing, does not contain toxic fire retardants, and is made in the USA (Wisconsin) with a limited 1-year warranty.

Material: Hypoallergenic fiber core made from recycled bottles; waterproof vinyl cover
Style: sustainable
Category: Baby & Toddler

Color

Royal Blue

Size

View on merchant site JSON

GTIN: 761139038578
MPN: DELTACHILDREN-761139038578-NEWOVERSTOCK

Specifications

The Twinkle Stars 4-inch Mini Crib Mattress is a hypoallergenic, firm mini mattress with a fiber core made from recycled bottles, a waterproof vinyl cover that wipes clean, and GREENGUARD Gold certification.

Hypoallergenic fiber core made from recycled bottles; firm support; waterproof, durable vinyl cover; fits most mini and portable cribs (38"L x 24"W x 4"H); GREENGUARD Gold certified; non-toxic construction; lightweight for easy handling; limited 1 year warranty.

Material: Hypoallergenic fiber core made from recycled bottles; waterproof vinyl cover
Secondary: pvc
Style: sustainable
Gender: unisex
Age Group: infant
Condition: new
Dimensions: 38x24x4 in
Category: Baby & Toddler

Additional Attributes

Fits most mini cribs and portable cribs (measures 38"L x 24"W x 4"H) — NOT designed for standard cribs or Pack 'n Plays
Hypoallergenic fiber core made from recycled bottles
Firm comfort and support
Non-toxic construction free from harmful materials/chemicals
Waterproof design with durable vinyl cover
Vinyl cover wipes clean
GREENGUARD Gold certified (low chemical emissions)
Meets or exceeds flammability, lead, phthalate and CPSIA testing; does not contain toxic fire retardants
Lightweight design for easy sheet changes, maneuvering and flipping
Waterproof cover blocks wetness to help prevent mold, mildew and odor
Limited 1 year warranty
Made in USA (Wisconsin)

Image Analysis

4 images

01high: A packaged Delta Children Twinkle Stars toddler/mini mattress shown upright on a white background. The mattress has a light gray patterned cover and a large blue product information label at the top that includes a baby photo, feature icons, an orange warning box, and a green GREENGUARD certification sticker.
OCR: DELTA CHILDREN Twinkle Stars WARNING GREENGUARD GOLD
toddler / crib mattressfabric mattress cover with subtle repeating patternproduct packaging labelbrand logo: DELTA CHILDRENproduct photo of baby on mattressblue information panel / labelorange WARNING box on labelicons (product feature icons) on labelbarcode on labelGREENGUARD certification sticker (green)white studio backgroundrounded mattress cornerssmall text blocks (specs / instructions) on label
02high: A woman and a young girl look into a white crib where a baby lies on a mattress. The woman gently touches the baby's tummy while the older child leans on the crib rail and smiles. The room is a nursery with framed wall art that reads 'LITTLE ONE' and pastel patterned wallpaper; the baby and older child wear matching printed pajamas.
OCR: LITTLE ONE
adult woman (caregiver) leaning over cribyoung girl/older sibling leaning on crib railbaby lying on crib mattresswhite crib with vertical slatscrib mattress/covermatching pajamas/onesies with small printed pattern (worn by baby and older child)woman wearing short-sleeve white shirtwall art / framed print(s) on walltext on wall art (framed print) reading 'LITTLE ONE'patterned nursery wallpaper (pastel shapes/hearts/feathers)window with outdoor view (trees/sky visible)hair bow on babysmiling expressions / interaction between family memberssoft lighting (indoor, natural light from window)
03high: Promotional image showing a Delta Children mini/portable crib mattress rendered in 3D perspective on a white background. Blue arrows indicate dimensions labeled 4" H (height), 38" L (length), and 24" W (width). A blue header reads "Fits MINI & PORTABLE CRIBS" and the DELTA CHILDREN brand/logo appears below the mattress.
OCR: Fits MINI & PORTABLE CRIBS 4"H 38"L 24"W DELTA CHILDREN
mini crib mattresstextured mattress covermattress side paneldrop shadow under mattressdimension arrows/lines (blue)measurement labels (4"H, 38"L, 24"W)top blue header/bannerheadline text in header: "Fits"subheader text in header: "MINI & PORTABLE CRIBS"brand logo/text: "DELTA CHILDREN" with heart iconwhite backgroundangled/3D perspective product rendering
04high: Studio product photo showing a Delta Children infant/crib mattress with a blue product label (includes a small photo of a baby on the mattress), certification logos to the right (GREENGUARD Gold, Made in the USA, Limited Lifetime Warranty), and the Delta Children brand name at the bottom. The mattress has a light gray patterned cover and sits against a white background.
OCR: DELTA CHILDREN Twinkle Stars WARNING GREENGUARD Product certified for low chemical emissions UL.COM/GG Made in the USA of USA and imported materials LIMITED LIFETIME WARRANTY
crib/infant mattressproduct packaging label (blue)photo of baby lying on mattressbarcodewarning text box on labelsmall feature icons on label (symbols)Delta Children brand text/logo (with heart)Twinkle Stars product namepatterned mattress cover (light grey with subtle print)GREENGUARD certification logo (Gold)Made in the USA emblem/logoLimited Lifetime Warranty badgewhite studio backgroundrectangular product shape

Brand PDP Lookup

Brand: Delta Children
URL: https://www.deltachildren.com/products/twinkle-stars-4-inch-mini-crib-mattress

Twinkle Stars 4-Inch Mini Crib Mattress

Documents & Data

Customer Reviews

1 total

1 reviews · out of 5

Sturdy and supportive mattress

★★★★★Leticia BalderasJun 12 2020

The crib I purchased from Delta Children came with a mattress but my mom gave me the idea to add another mattress for height and I am so glad I did. This mattress is thick, comfortable and supportive. Yes, I did lay on it lol highly recommend for your mini crib!

Sturdy and supportive mattress

★★★★★Leticia BalderasJun 12 2020

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Q&A

4 answered

What is the Standard Size of a Crib Mattress?: The safest size of baby cribs and crib mattresses is determined by the federal government. The Consumer Products Safety Commission (CPSC) requires all full-size baby crib mattresses to be at least 27 and ¼ inches in width by 51 and ¼ inches in length, with a maximum thickness of six inches. But for cribs, the standard size isn’t as simple.
What is the Standard Size of a Baby Crib?: The CPSC requires that full-size baby cribs have a standard width of 28 inches and a standard height of 52 and ⅜ inches, but with a “pull or minus factor” of ⅝ inches. Because of this variation, it’s important to look for the recommended mattress size listed on the crib’s box and/or assembly instructions. All Delta Children, Serta and Beautyrest crib mattresses are compatible with all Delta Children cribs, making it easier to buy the products that are safe for your little one’s nursery.
How Can I Tell if a Crib Mattress Fits in my Crib?: Crib mattresses should fit very snug or moderately snug in the crib. No more than two fingers of space should exist between the side of the mattress and the crib frame. A mattress that is too small for the crib could be a suffocation and entrapment hazard.
How Firm Should a Crib Mattress Be?: The firmer, the better when it comes to crib mattresses. Soft surfaces can pose a suffocation hazard and increase your baby’s risk of Sudden Infant Death Syndrome (SIDS). You can test a how firm a mattress is by pressing on its center and edges. When you release pressure, it should snap back immediately.