The twin size mattress is one of the most common choices for a child's bed. It measures 39 inches wide by 75 inches long, making it a perfect fit for smaller bedrooms or shared spaces. The twin size mattress is also a great option for children who are transitioning from a crib to a larger bed, as it provides enough space for them to stretch out comfortably.1. Twin
A crib size mattress is specifically designed for babies and toddlers. It is smaller than a twin size mattress, measuring 28 inches wide by 52 inches long. This size is perfect for fitting into a standard crib and provides a safe and comfortable sleeping space for your little one. Many crib size mattresses are also made with materials that are hypoallergenic and waterproof, making them the ideal choice for young children.2. Crib
The youth size mattress is a step up from the twin size and is often referred to as a three-quarter size. It measures 48 inches wide by 75 inches long, providing a bit more space for growing children. This size is perfect for children who may not yet be ready for a full-size bed but have outgrown their twin size mattress. It is also a great option for smaller guest rooms or for siblings who share a room.3. Youth
For children who have a small bedroom or share a room with a sibling, a small size mattress may be the perfect solution. Measuring 30 inches wide by 75 inches long, it is slightly narrower than a twin size and is a great fit for smaller spaces. This size is also commonly used in bunk beds or as a daybed for children's playrooms.4. Small
Similar to the crib size, a toddler size mattress is designed specifically for young children. It measures 27 inches wide by 52 inches long and is the perfect size for a toddler bed. Many toddler size mattresses come with fun and colorful designs, making them a great choice for children who are transitioning to their first "big kid" bed.5. Toddler
Bunk beds are a popular choice for siblings who share a room or for children who love sleepovers. A bunk size mattress is specifically designed to fit into bunk beds and measures 30 inches wide by 75 inches long. Not only does this size save space, but it also allows for easy maneuvering when changing sheets or making the bed.6. Bunk
The junior size mattress is a bit larger than a crib size and is a great option for young children who are ready for a bigger bed. Measuring 30 inches wide by 66 inches long, it provides a bit more room for growing children without taking up too much space in the room. This size is also commonly used in daybeds or trundle beds.7. Junior
As the name suggests, a compact size mattress is perfect for small spaces. It measures 36 inches wide by 75 inches long, making it slightly narrower than a twin size. This size is great for children who have limited space in their bedroom or for use in a camper or RV. Many compact size mattresses also come with features such as memory foam or gel-infused foam for added comfort.8. Compact
The narrow size mattress is similar to the compact size, measuring 36 inches wide by 72 inches long. It is a great choice for children who have a small bedroom or for use in a camper or boat. This size is also commonly used in daybeds or trundle beds and can provide a comfortable sleeping space for children or guests.9. Narrow
A mini size mattress is the smallest option on our list, measuring 24 inches wide by 38 inches long. It is commonly used in portable cribs or play yards and is perfect for traveling with young children. Many mini size mattresses also come with a carrying case for easy transport and storage.10. Mini