Sized at 19. 5" x 14. 5" they are meant to fit most standard toddler pillows. The pillowcase is held on by an envelope style side closure and one wash and dry cycle will shrink the pillowcase slightly for a snug fit.
The Good Vibes is the only crib wedge that provides both comfortable incline and soothing vibration to help little ones fall asleep and stay asleep, especially when transitioning from inclined sleepers to the crib.