Enter your pack n' play or travel crib size. I will tell you if the Hiccapop DayDreamer can drape over it before you buy.
Based on the DayDreamer's listed size of 50 x 36 x 56 inches. Measure your playard at its widest points, corners included. Odd-shaped or bassinet-style playards can vary, so treat a close call as "measure twice."