discoverRoomPlanner_Icon_28x28
Skip to Main Content
Sign In

Crib Dimensions: Picking the Right Crib Size

Buying a crib for your baby is no small decision.

A blue and white nursery with blue paneled walls and a round area rug with sea creatures


Cribs are one of the biggest investments you’ll make in your baby's nursery and well-being, so it’s important to choose the right one. Don't guess when it comes to crib size – read on to learn exact crib dimensions so you can get it right the first time.


Crib Dimensions
Standard Crib Size
Mini Crib Size
Crib Mattress Size



Crib Dimensions

There are two types of crib dimensions: standard crib size and mini crib size. A standard crib is found in most nurseries and is designed for infants and toddlers until they are about 18–24 months old. Mini cribs are smaller and are typically used for a shorter amount of time depending on the growth of your baby.



Standard Crib Size

A standard sized crib is 51 3/8" – 52 5/8" L x 27 3/8" – 28 5/8" W. Standard cribs are designed to comfortably fit your baby during the first 18–24 months of their life. Some standard cribs are designed to transform into a toddler bed as your little one grows – saving you money and time searching for a toddler bed. These convertible cribs typically include additional parts that help the crib transition into a new, larger sleeping space.


The size of your nursery will affect the crib dimensions you choose. Standard crib dimensions fit best in larger rooms and spaces, such as open-layout nurseries. For more tips on how to fit a standard crib in your space, check out our Baby Nursery Room Layouts guide.


Shop Standard Cribs



Mini Crib Size

A mini crib size is 37 3/8" – 38 5/8" L x 23 3/8" – 24 5/8" W. Sometimes interchangeably known as portable cribs, mini cribs are an excellent alternative to the larger standard crib size. The smaller crib dimensions makes them great for tight or limited spaces. They are very lightweight, and some can be easily folded up, wheeled into a corner, or packed away for travel or other extended stays.


Mini cribs can be more budget-friendly and are excellent choices for homes without separate nursery rooms or for nurseries that serve multiple purposes. Due to their smaller size, mini cribs won’t fit your child as long as a standard crib will. Monitor your baby's growth to ensure that they can still comfortably stretch and sleep in the crib.


Shop Mini Cribs



Crib Mattress Size


The standard crib mattress size is 52" L x 27" W. The mattress is typically 5" – 6" thick and should not be thicker than 6". For safety reasons, there should be no gaps larger than two fingers wide between the mattress and the crib. The typical mattress size for a mini crib is 38" L x 24" W. The thickness tends to be lower, around 3" – 4" high and no higher than 5". For more information on this, read our How to Pick the Right Crib Mattress Size guide.


Shop Crib Mattresses

Check Out Our Most Popular Cribs!

ServerT:1.146192073822