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Co-sleeper® size:  fits mattresses covered with sizes B,C, P, and D BabeSafe covers
Playpen size:  fits mattresses covered with size C and P BabeSafe covers on pack n play playpens
Crib Size:  fits crib mattresses covered with size E and/or F BabeSafe covers.
Bassinet/Cradle Size:  sizes vary immensely, so we sell these on a custom order basis.  See link in red to place your custom order.

Designed by Baby's Sake to fit securely on your BabeSafe-wrapped mattress and beneath your fitted cotton sheet. Handmade with care, we also custom make underblankets to any size of baby mattress.

 - Slip corner elastics over your BabeSafe-wrapped crib mattress, then place our fitted sheet on top as normal.  This will give an extra layer of softness and thickness for your baby's comfort.

Why use an underblanket?

  The reason for the underblanket is comfort for the baby.  It provides an extra layer of softness between the mattress cover and the fitted sheet.  It also adds warmth under the baby.  The mattress cover is a vinyl/plastic-like  material which can be cold and make some noise when the baby moves.  The underblanket greatly reduces this.  Some moms have announced that they love our underblankets so much that they use them over their fitted sheets!  But our fitted sheet are just as soft and luxurious so we recommend buying our fitted sheets as well and using them on top.