Crib Mattress Fit

Buying a crib is an exciting part of your journey into parenthood – and one that many parents-to-be tackle before purchasing a crib mattress. All crib mattresses are designed to fit inside USA-standard full-size cribs and toddler beds, so it’s important to measure the inside dimensions of your crib to ensure that it meets these safety standards. Look for product dimension measurements instead of shipping measurements to be sure of the size and don’t purchase “mini crib” mattresses made exclusively for mini cribs.

KEEP IN MIND:

  • The inside of your crib should measure between 27 3/8 to 28 5/8 inches wide and between 51 3/4 and 53 inches long.
  • Mattresses are designed to be slightly smaller than these standard dimensions. Many pediatricians recommend that parents do a two-finger test to ensure that there is no more than a 1 1/4 inch gap between the mattress and crib.
  • All crib mattresses must not exceed 6 inches in height when measured from seam to seam. This helps to ensure that baby cannot climb out of her crib as she grows.

HOW DO I MEASURE MY CRIB?

  • Measure the INTERIOR of your crib to the below specifications. If your crib measures any smaller or larger, please contact the crib manufacturer as your crib does not meet crib regulations.
  • Crib dimensions are dictated by ASTM and Federal Law. The dimensions in the crib standard require cribs to have interior dimensions of 28 +/- 5/8 inches wide and 52 3/8 +/- 5/8 inches long.
  • The inside of your crib should measure somewhere between 27 3/8 to 28 5/8 inches wide and between 51 ¾ and 53 inches long. Mattresses are designed to be slightly smaller to allow them to fit within these dimensions.

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