When getting ready for a new baby, every little detail matters, especially when it comes to where they’ll be sleeping. Picking the right crib sheet size isn’t just about making things cozy—it’s also about keeping your baby safe. We’ll walk you through the common crib sheet sizes so you can easily pick the right one for your baby’s crib.

Standard Crib Sheet Size

In the U.S., the most common crib sheet size is made to fit a standard crib mattress, which typically measures 28 inches wide by 52 inches long (71 cm x 132 cm). This size is recommended by the Consumer Product Safety Commission (CPSC) and works for most standard crib mattresses.

In addition to length and width, crib mattresses are usually between 4 to 6 inches thick. It’s super important to choose sheets that fit snugly around the mattress because loose or ill-fitting bedding can increase the risk of suffocation.

Helpful Tip: When buying crib sheets, make sure to check the depth of your mattress to ensure the sheet will fit securely and won’t slip off easily.

Why Choosing the Right Size Crib Sheet is Important

A snug-fitting crib sheet isn’t just for convenience—it’s crucial for your baby’s safety. According to the American Academy of Pediatrics (AAP), a well-fitted sheet helps prevent loose fabric, which can pose a suffocation risk or lead to Sudden Infant Death Syndrome (SIDS). Be sure to choose sheets with elastic that goes all the way around the mattress, so they stay securely in place, even if your baby moves during sleep.

Crib Mattress Measurement

Before buying crib sheets, it’s a good idea to measure your crib mattress to make sure the sheets will fit properly.

Measure the Length and Width

Rectangular Mattresses: Use a tape measure to check the length and width. Most standard rectangular crib mattresses are about 28 inches wide by 52 inches long. Ensure the mattress is flat for the most accurate measurements.

Oval Mattresses: For oval-shaped mattresses, measure the longest length from one end to the other, and then measure the widest point across the middle.

Round Mattresses: For round mattresses, measure the diameter by stretching the tape measure across the widest part of the mattress.

Measure for Hourglass or Peanut-Shaped Mattresses: Measure the longest point of the mattress, making sure to follow the curves to capture the entire length accurately.

Measure the widest point. For hourglass shapes, this is typically at the ends, while for peanut shapes, measure the broader areas.

Check the Thickness

Measure the thickness of the mattress from the top to the bottom. Crib mattresses typically range from 4 to 6 inches deep, but hourglass and peanut-shaped mattresses may vary, usually being between 2 to 5 inches thick. This measurement is vital for ensuring the fitted sheet wraps securely around the mattress.

Tips for Accurate Measurement

Always measure with the mattress placed on a flat surface to achieve the most accurate dimensions.

It’s wise to measure each dimension a couple of times to confirm accuracy, especially for non-standard shapes or curves. And record your measurements.

By taking these measurements, you can avoid the hassle of dealing with returns or exchanges.

Choosing the Right Crib Sheet

Once you've measured your mattress, it’s time to choose the right crib sheets. Here are some practical tips:

Use your measurement results to find crib sheets that fit your mattress perfectly. For standard rectangular mattresses, simply look for sheets that match those dimensions. However, if your mattress is a non-standard shape, like an oval or hourglass, be sure to check the product description to confirm that the sheets are compatible with your mattress shape.

Go for fitted sheets with elastic all the way around. This is super important to ensure a snug fit, especially for those tricky shapes. A secure fit helps keep loose fabric at bay, which is key for your baby’s safety.

Think about how stretchy the fabric is. Some materials, like jersey knit, have a bit more give, making it easier to put them on and take them off while still holding snugly in place.

If your mattress is on the thicker side, look for crib sheets with deep pockets. These are designed to fit thicker mattresses and help prevent slipping.

Choosing the Right Material for Crib Sheets

When selecting crib sheets, it’s important to consider not just the size but also the right material for your baby’s comfort and safety.

Cotton sheets are a favorite among parents because they’re breathable, hypoallergenic, and easy to wash. Their excellent breathability helps regulate your baby’s temperature, keeping them comfortable all night long. Opt for organic cotton to avoid harmful chemicals often found in conventional cotton processing.

Bamboo fabric is another great choice, especially for babies with sensitive skin. It has natural antibacterial properties, and moisture-wicking abilities, and is incredibly soft, which helps keep your baby dry and comfortable. Bamboo sheets are also eco-friendly, making them a sustainable option for environmentally conscious parents.

Polyester sheets tend to be more affordable and durable. While they might not be as breathable as cotton or bamboo, many high-quality polyester sheets are designed with breathability in mind. Blends can offer the softness of natural fibers and are easy to care for. They often come with stain-resistant and quick-drying features, making them a practical choice for busy parents.

Other Considerations

For crib sheets, it’s generally recommended to wash them at least once or twice a week. This frequency helps maintain a clean and hygienic sleep environment for your baby, as sheets can quickly accumulate bacteria and odors from spills and messes.

Choosing sheets that can withstand multiple washes without losing their shape or softness is a wise investment. Durable fabrics like high-quality polyester and organic cotton can save you money in the long run.

Since frequent washing is a reality for busy parents, selecting machine-washable crib sheets is essential.

Additionally, look for sheets with OEKO-TEX or GOTS certifications. These labels indicate that the materials are free from harmful chemicals and safe for infants to use.

Finally, consider the design and colors of the sheets. Various patterns and colors can enhance your nursery decor while also stimulating your baby’s visual senses and promoting cognitive development.

Conclusion

When choosing crib sheets, the two most important factors to consider are size and safety. It’s also a good idea to have a few extra sets on hand, as this makes changing and washing easier, especially during unexpected messes.

If you’re looking for new crib sheets, check out Ownkoti. All our products are made from reusable, biodegradable, sustainable, and non-toxic materials, crafted from recycled resources to ensure your baby's safety and comfort.

In addition to crib sheets, You can also find complete crib bedding sets at Ownkoti, including quilts, crib skirts, etc., reducing the time spent on matching.