The number one concern parents have when welcoming a new baby is safety, and more importantly, sleep safety. Purchasing a crib mattress can be confusing so this guide can help you narrow your choices from the correct crib mattress size to firmness, breathability and more.
The United States Consumer Product Safety Commission states that a standard crib mattress size is 27 1/4 inches x 51 1/4 inches with a thickness not exceeding 6 inches. These regulations help keep your baby safe and reduce the risk of your baby from getting stuck between the crib mattress and crib rails. But size is just one thing to look for with a mattress. Here are some other tips to help you out when choosing the best crib mattress for your baby.
Standard Crib Mattress Size

Firmness
A crib mattress should provide your baby with a firm, flat sleeping surface. This is particularly important when your infant becomes more mobile and active. they will need a firm surface to push up on, turn, and even stand in their crib. Soft sleeping surfaces and loose bedding should be avoided since they can create suffocation hazards for infants and increase the risk of Sudden Infant Death Syndrome (SIDS).
Breathability
Having a breathable mattress can help your infant sleep longer, safely, and more sound. A mattress made with porous materials allows for good airflow which can help reduce sleep disruptions due to heat and allows the baby to breathe freely through the mattress even if he rolls onto his stomach. The most breathable crib mattresses are made with innerspring coils and organic comfort layers like wool, cotton and coconut coir.
Built with Organic Materials
The National Sleep Foundation recommends that infants in their first year of life sleep approximately 12-17 hours per day. That is a great deal of time spent on their crib mattress, so making sure it is as healthy as possible is important. Invest in a mattress that is organic and free of toxic chemicals. Be sure to Look for the GOTS (Global Organic Textile Standard) or GOLS (Global Organic Latex Standard) certification. Whenever possible avoid flame retardants, polyurethane, and vinyl in all of your baby products.

Choosing the Correct Crib Accessories
Once you’ve made your crib mattress selection, you should also look into protecting your investment with an organic waterproof mattress protector. A crib mattress protector can protect your mattress from moisture, dust mites, and other allergens. Just add an organic cotton fitted crib sheet and your baby will be ready for a healthy night’s sleep. . Just like when purchasing your crib mattress, it is important to look for the GOTS certification when purchasing a mattress protector and sheet set.