Enter your pack n' play or travel crib size. I'll 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."