Hi Che7, we're sorry to hear that you were surprised that the tiles were so thin. We put "Feather-Light" right in the product name, our listing states that they're .013" of an inch thick, and also mentions that they're "about the thickness of a business card". While they are thin, they're certainly not flimsy. Since they're made from a rigid vinyl material (one of the most popular construction materials and vastly different than polystyrene drinking cups), they're quite durable despite their light weight. ASTM testing shows them to be "an order of magnitude more durable than mineral fiber ceiling tiles". All Ceilume ceiling tiles are made in the United States and are Class A fire rated, GreenGuard Gold certified for Indoor Air Quality, and are impervious to moisture. Considering all of that, we think they're a bargain and hope that over time you'll come to love them in your home.