Walmart offers the Mainstays Room Darkening Curtain Panel in Dotted or Diamond in several colors (Peacock Dotted pictured) starting at $3.99. Opt for in-store pickup to dodge the $5.99 shipping charge. That's up to $14 off list and the lowest price we could find. They're available in sizes 42" x 54", 42" x 63", 42" x 84", and 42" x 95".