A crib is often the centerpiece of a nursery and where your baby may sleep for years. Choosing one involves safety, size, style and budget. Current cribs must meet safety standards, but setup and mattress choice also matter.
This guide covers crib types, safety considerations and setup basics. For sleep-related health questions, talk with your pediatrician and follow current safe sleep guidance from recognized health organizations.
Crib Types
Standard Cribs
Full-size cribs that fit standard crib mattresses. Many have adjustable mattress heights.
Convertible Cribs
Convert into toddler beds, daybeds or full-size beds with conversion kits, which may be sold separately.
Mini Cribs
Smaller than standard cribs; useful for small spaces. They require mini crib mattresses and are outgrown sooner.
Bassinets and Play Yards
Not cribs, but often used for early months. Follow weight and age limits. Some families start with a bassinet near their bed and move to a crib later.
Safety Standards
Cribs sold in the United States must meet federal safety standards. Look for:
- Fixed sides; drop-side cribs no longer meet standards
- Slat spacing within standards
- Sturdy hardware
- No cutouts in headboards or footboards that could trap a head
- Corner posts that do not stick up
Check for recalls on official recall databases.
Used Cribs
Used cribs can be risky:
- They may not meet current standards
- Parts may be missing or broken
- Instructions may be lost
- They may be recalled
If using a used crib, check its manufacture date, compare it against current standards, confirm all parts and look up recalls.
Mattresses
- Use a firm, flat mattress made for the crib size
- The mattress should fit snugly without large gaps
- Use a fitted sheet made for the mattress
- Remove plastic packaging
Some mattresses have a firmer infant side and a softer toddler side.
Assembly
- Follow instructions exactly
- Tighten all hardware
- Recheck hardware periodically
- Do not substitute parts
- Keep instructions for future conversions
Placement
- Away from windows, blinds and cords
- Away from heaters and vents
- Away from shelves or decor that could fall
- Not within reach of furniture a child could climb
See the baby-proofing checklist.
Safe Sleep Setup Basics
Safe sleep guidance generally includes:
- Firm, flat mattress with fitted sheet
- No pillows, blankets, bumpers or toys in the crib
- Baby placed on back to sleep
Follow current guidance from your pediatrician.
Adjusting Mattress Height
Many cribs start with a higher mattress position for newborns. Lower the mattress as your baby begins to sit and pull up, as instructed in the manual.
Style and Finish
- Choose finishes labeled non-toxic or meeting relevant standards
- Consider teething rails
- Consider long-term style if converting to a bed
Budget
Cribs vary in price. Convertible cribs may offer long-term value if you plan to use the conversions. Factor in mattress and conversion kit costs. See nursery on a budget.
Questions to Ask Before You Buy
- Standard, convertible or mini?
- Does it fit the room?
- Are conversion kits included?
- Which mattress fits?
- Has it been recalled?
Common Mistakes
- Using drop-side or recalled cribs
- Poorly fitting mattresses
- Placing cribs near cords and windows
- Adding bumpers and loose bedding
- Forgetting to lower the mattress
Comparison of Sleep Spaces
| Sleep space | Typical stage | Considerations |
|---|---|---|
| Bassinet | Early months | Follow weight and developmental limits |
| Play yard | Early months to toddler | Use only the mattress provided |
| Mini crib | Infant to toddler | Smaller mattress; outgrown sooner |
| Standard crib | Infant to toddler | Fits standard crib mattresses |
| Convertible crib | Infant to big-kid bed | Conversion kits may cost extra |
Moving from Bassinet to Crib
Many families move their baby from a bassinet to a crib when the baby reaches the bassinet’s limits or begins rolling or pushing up, whichever the manual specifies. Plan the transition ahead of time, set up the crib early and ask your pediatrician if you have questions about sleep.
Converting to a Toddler Bed
When your child starts climbing or reaches the crib’s height guidance, it may be time to convert. Use the manufacturer’s conversion kit, follow the instructions and recheck room safety, since a child who can leave the bed can reach more of the room.
Final Pre-Use Check
- All hardware tight
- Mattress fits snugly
- Fitted sheet only
- Crib away from cords, windows and heaters
- Mattress at the right height
- Recall check completed
A Note on Teething Rails
Toddlers sometimes chew crib rails. Teething rail covers designed for your crib can protect the finish. Choose covers that attach securely and do not create loose fabric inside the crib.
Questions to Ask the Retailer
- What is the return policy?
- Are conversion kits available and how long will they be sold?
- What mattress sizes fit?
- Is assembly included?
Starting Small
Some families start with a bassinet or play yard and buy a crib later. That gives time to choose and shop sales without rushing.
A Note on Crib Sheets
Choose fitted sheets made for your mattress size so they stay snug. Keep several on hand for middle-of-the-night changes, and check that elastic remains firm after washing. Replace sheets that loosen.
A Note on Assembly Help
Some retailers offer assembly services. If you assemble it yourself, set aside time, keep children and pets out of the room and have a second adult help with large panels.
Frequently Asked Questions
What type of crib should I buy?
Choose based on space, budget and long-term plans.
Are used cribs safe?
Only if they meet current standards with all parts and no recalls.
Do I need a special mattress?
Yes, a firm mattress made for the crib size.
Can I use crib bumpers?
Safe sleep guidance generally advises against bumpers.
When should I lower the mattress?
When your baby starts sitting or pulling up, as instructed by the manual.
The Bottom Line
Choose a crib that meets current standards, fits your room and budget and has a firm, well-fitting mattress. Assemble carefully, place it away from hazards and follow current safe sleep guidance.
Editorial note: Nursery Roost is independent and reader-supported. This guide is based on research into manufacturer documentation, published specifications and widely accepted best practices; we have not been paid to mention any product. If we add affiliate links in the future, they will be clearly disclosed per our Affiliate Disclosure.