Baby Crib Mattress: How Firm and What Size

The AAP recommends a firm, flat crib mattress that fits snugly in the crib — no more than 2 fingers' gap between the mattress and the crib rails. A good crib mattress costs USD 50 to 200 and lasts about 5 to 10 years.

How Firm Should a Crib Mattress Be?

The AAP requires: - A firm, flat surface - No more than 2 fingers' gap between mattress and crib rails - A tight-fitting fitted sheet - No soft bedding, pillows, or toys To test firmness: press down in the center and edges. The mattress should not conform to your hand. If it sinks more than 2.5 cm (1 inch), it's too soft. Soft mattresses increase the risk of SIDS. For safe sleep, use soft towels only for drying, not bedding.

What Size Crib Mattress Do I Need?

Standard crib mattress dimensions: - Size: 132 x 70 cm (52 x 27.5 inches) - Thickness: 10 to 15 cm (4 to 6 inches) - Weight: 3 to 7 kg - Gap: no more than 2 fingers Measure your crib before buying. A mattress that doesn't fit snugly is a safety hazard — baby can get trapped. Most standard cribs use the same mattress size. For more nursery essentials, visit Moni Happy's collection.

What Material Is Safest?

Safe materials: - Innerspring: durable, firm, breathable - Foam: lightweight, make sure it's firm - Natural fiber: coconut coir, organic cotton - Waterproof cover: protects against spills Avoid: - Memory foam (too soft) - Mattresses with vinyl covers (chemical smell) - Hand-me-down mattresses older than 5 years The AAP recommends a new mattress for each new baby. For more safe sleep tips, keep wipes handy.

How Long Does a Crib Mattress Last?

Most crib mattresses last 5 to 10 years. Replace when: - It shows sagging or indentations - The cover is torn or stained - It's more than 5 years old - It doesn't fit snugly anymore The AAP recommends not using a hand-me-down mattress older than 5 years. Old mattresses can harbor dust mites, mold, and bacteria. For more nursery essentials, browse diapers, pull-up pants, and all products.

Should I Buy a Waterproof Mattress Cover?

Yes. A waterproof cover: - Protects against diaper leaks and spit-up - Is easy to wipe clean - Reduces dust mites - Extends mattress life Choose a cover that: - Fits snugly - Is made from breathable fabric - Is free of PVC and vinyl - Can be wiped or machine-washed For bed changes, keep wipes and a spare fitted sheet nearby.

Bottom line: Choose a firm, flat crib mattress that fits snugly (no more than 2 fingers' gap). The AAP requires firm surfaces to reduce SIDS risk. Look for innerspring or firm foam, USD 50 to 200. Replace every 5 to 10 years. Add a waterproof, breathable cover. Never use a soft mattress or hand-me-down older than 5 years.